sextantn.

Brit.

/ˈsɛkst(ə)nt/, U.S.

/ˈsɛkst(ə)nt/

Forms: 1600s sextante, 1600s– sextant.

Origin: A borrowing from Latin. Etymons: Latin sextant-, sextāns.

Etymology: < classical Latin sextant-, sextāns sixth part (of an as, acre, etc.), in post-classical Latin also denoting an astronomical instrument (1598: see note at definition) < sextus sixth (see sext n.¹) + -āns (in quadrāns quadrant n.¹). Compare earlier quadrant n.¹ (in various senses). Compare also earlier sextans n.Compare earlier sextan (plural sextans ) in sense 1, apparently arising from misapprehension of classical Latin sextāns as a plural:1592 A. Munday tr. G. Telin Archaioplutos sig. M 4^v There is required sixe Sextans to make or value an As. A Sextan is a coyne lesse then that which is called a Quadran by the third part.In sense 5 after German Sextant (1868 or earlier).

†1. A Roman coin of the value of one-sixth of an as. Obsolete.

ΘΚΠ

society > trade and finance > money > medium of exchange or currency > coins collective > classical coins > [noun] > ancient Roman

pennyOE

quadrant1533

as1541

sesterce1541

sestertius1567

dupondius1601

quinare1601

quinarius1601

sextant1601

triens1601

trient1601

assarion1625

quadrans1654

quinary1728

nummus1771

follis1784

uncia1834

minimus1852

semis1853

siliqua1889

minim1896

1601 P. Holland tr. Pliny Hist. World II. xxxiii. x. 480 That purse..wherein every man put his sextant, i. the sixt part of an As.

1656 T. Blount Glossographia Sextant, a coin less then that called Quadrant, by the third part.

1885 J. LeRoux Vade Mecum du Collectionneur 65 Sextant,... Roman coin weighing 2 ounces.

2. An instrument for making angular measurements, esp. of the altitude of celestial or distant terrestrial objects, consisting of a graduated arc, originally of one-sixth of a circle (60 degrees), and a means of sighting the object. Cf. quadrant n.¹ 7, octant n. 1a.Tycho Brahe, Astronomia instauratae mechanica (1598) sig. A4, states that he gave the name sextans to this instrument. Later the principle of double reflection was used to produce the marine sextant, which measured up to 120 degrees and became the main instrument for navigation.air-, bubble sextant: see the first element.

ΘΚΠ

the world > relative properties > number > geometry > shape or figure > [noun] > two-dimensional > figure forming part of circle

nook cantle1551

quadrate1551

quadrant1559

section1570

sector1570

segment1570

sextant1628

half-round1718

octant1753

society > travel > travel by water > vessel, ship, or boat > equipment of vessel > navigational aids > [noun] > quadrant, sextant, etc.

quadrant?c1400

quadrate1551

sextant1628

sinical quadrant1669

bow1696

pig yoke1836

hog yoke1897

ham-bone1938

the world > the universe > cosmology > science of observation > astronomical instruments > measuring altitude > [noun] > quadrant or sextant > sextant

sextant1628

ham-bone1938

1628 R. Burton Anat. Melancholy (ed. 3) ii. ii. iv. 264 To examine and calculate the motions of the Planets,..by those curious helps of glasses, astrolabes, sextantes, quadrants.

1674 R. Hooke Animadversions Machina Cœlestis 16 The second Instrument, which..he describes, is a Sextant of Brass.

1726 J. Swift Gulliver II. iii. iii. 37 Stored with great variety of Sextants, Quadrants, Telescopes..and other Astronomical Instruments.

1774 M. Mackenzie Treat. Maritim Surv. 32 Hold the Sextant vertically, and direct the Sight to some Object in the Horizon, or between you and the Sky, under the Sun.

1828 Moore's Pract. Navigator (ed. 20) 156 Hadley's Sextant is constructed on the same principles as the Quadrant; but..the Arch is extended to 120°..; it is also provided with some appendages not generally annexed to a Quadrant.

1860 C. Dickens Let. 23 Sept. (1997) IX. 315 His sextant (which is about the size and shape of a cocked hat), on being applied to his eye, entirely concealed him.

1868 J. N. Lockyer Elem. Lessons Astron. §520 If we require to measure simply the angular distance of one celestial body from another, we employ a sextant.

1941 C. Beaton Diary Apr. in Self Portrait with Friends (1979) xi. 87 The navigator is laying out his chart, adjusting his astrograph, arranging his sextant and numerous papers and bundles into position.

1969 Jrnl. Inst. Navigation 22 489 The Kollsman KS.85 photo-electric sextant could prove a valuable asset in such an area to ensure the bounding of heading and position errors inherent in automatic D.R. systems if a navigator is not carried.

2000 J. Griffiths Grip on Thin Air 51 Two stems of couch-grass angle like a sextant.

†3. The sixth part of a circle; = sextans n. 2. Obsolete. rare.

ΘΚΠ

the world > relative properties > number > geometry > curve > [noun] > part of circle

arc1570

sextans1596

circumference1656

quadrant1660

quintant1684

sextant1730

octant1753

supplemental arc1754

multiple arc1802

explement1817

1730 N. Bailey et al. Dictionarium Britannicum Sextant, with Mathematicians is the 6th Part of a Circle, or an Arch comprehending 60 Degrees.

4. Astronomy. (The English name of) the constellation Sextans.Chiefly as a conscious translation.

ΘΚΠ

the world > the universe > constellation > Southern constellations > [noun] > Sextans

sextant1742

1742 R. Long Astron. I. ii. ii. 175 Hevelius's constellations made out of unformed stars... Sextans..the Sextant.

1795 C. Hutton Math. & Philos. Dict. Sextans, the Sextant, in Astronomy, a new constellation, placed across the equator, but on the south side of the ecliptic.

1875 Encycl. Brit. II. 817/1 The constellations added by Hevelius are the following..:——..10. Sextans, The Sextant.

1944 Science 20 Oct. 10/1 Amateurs interested in rediscovering Comet Berry..should search in the constellations of Crater, the cup, Leo, the lion, and Sextans, the sextant.

2007 Daily Tel. (Nexis) 1 Jan. 22 The winter constellations of Hydra, the Water Snake, and Sextans, the Sextant, appear almost empty and get little publicity.

5. Botany. Each of a group of six cells or segments.

ΘΚΠ

the world > life > biology > substance > cell > types of cells > [noun] > other types of cells

reticular cell1832

torula1833

reserve cell1842

subcell1844

parenchyma cell1857

pedicel cell1858

nettle cell1870

heterocyst1872

prickle cell1872

angioblast1875

palisade cell1875

sextant1875

spindle cell1876

neuroblast1878

body cell1879

plasma cell1882

reticulum cell1882

stem cell1885

Langhans1886

basal cell1889

pole cell1890

myelocyte1891

statocyst1892

mast cell1893

thrombocyte1893

iridocyte1894

precursor1895

nurse cell1896

amacrine1900

statocyte1900

mononuclear1903

oat cell1903

myeloblast1904

trochoblast1904

adipocyte1906

polynuclear1906

fibrocyte1911

akaryote1920

Rouget cell1922

Sternberg–Reed1922

amphicyte1925

monoblast1925

pericyte1925

promyelocyte1925

pituicyte1930

agamete1932

sympathogonia1934

athrocyte1938

progenitor1938

Reed–Sternberg cell1939

submarginal1941

delta cell1942

mastocyte1947

squame1949

podocyte1954

transformed cell1956

transformant1957

spheroplast1958

pinealocyte1961

immunocyte1963

lactotroph1966

mammotroph1966

minicell1967

proheterocyst1970

myofibroblast1971

cybrid1974

the world > plants > part of plant > cell or aggregate tissue > [noun] > cell > types of > other types

bast cell1842

basal cell1846

pollen cell1857

companion cell1859

segment1862

pollen mother cell?1870

sextant1875

transfusion cell1875

idioblast1882

trichoblast1882

symplast1894

megasporocyte1924

oat cell1940

heterokaryon1945

1875 A. W. Bennett & W. T. T. Dyer tr. J. von Sachs Text-bk. Bot. 122, 123 The section of the stem now appears as if composed of six cells or sextants [Ger. Sextanten], whose walls are placed nearly radially, forming a six-rayed star... Hence the walls..are called sextant-walls... The sextant-cells are still further broken up.

1884 F. O. Bower & D. H. Scott tr. H. A. de Bary Compar. Anat. Phanerogams & Ferns 19 Then follows in each of these the division into alternately dissimilar sextants.

1933 Bot. Gaz. 94 484 The remaining large sextant divides once, forming an inner lignified metaxylem cell and a protoxylem cell.

1962 Bot. Gaz. 124 137/1 The endodermal initial cells (except those that form secondary root initials at this sextant stage) undergo only radial divisions.

1993 Amer. Jrnl. Bot. 80 472/2 Nägeli and Leitgeb (1868) were concerned with finding the early formation of sextants in roots of vascular cryptogams.

This entry has been updated (OED Third Edition, December 2008; most recently modified version published online March 2022).

单词	sextant
释义	sextantn. Brit. /ˈsɛkst(ə)nt/, U.S. /ˈsɛkst(ə)nt/ Forms: 1600s sextante, 1600s– sextant. Origin: A borrowing from Latin. Etymons: Latin sextant-, sextāns. Etymology: < classical Latin sextant-, sextāns sixth part (of an as, acre, etc.), in post-classical Latin also denoting an astronomical instrument (1598: see note at definition) < sextus sixth (see sext n.¹) + -āns (in quadrāns quadrant n.¹). Compare earlier quadrant n.¹ (in various senses). Compare also earlier sextans n.Compare earlier sextan (plural sextans ) in sense 1, apparently arising from misapprehension of classical Latin sextāns as a plural:1592 A. Munday tr. G. Telin Archaioplutos sig. M 4^v There is required sixe Sextans to make or value an As. A Sextan is a coyne lesse then that which is called a Quadran by the third part.In sense 5 after German Sextant (1868 or earlier). †1. A Roman coin of the value of one-sixth of an as. Obsolete. ΘΚΠ society > trade and finance > money > medium of exchange or currency > coins collective > classical coins > [noun] > ancient Roman pennyOE quadrant1533 as1541 sesterce1541 sestertius1567 dupondius1601 quinare1601 quinarius1601 sextant1601 triens1601 trient1601 assarion1625 quadrans1654 quinary1728 nummus1771 follis1784 uncia1834 minimus1852 semis1853 siliqua1889 minim1896 1601 P. Holland tr. Pliny Hist. World II. xxxiii. x. 480 That purse..wherein every man put his sextant, i. the sixt part of an As. 1656 T. Blount Glossographia Sextant, a coin less then that called Quadrant, by the third part. 1885 J. LeRoux Vade Mecum du Collectionneur 65 Sextant,... Roman coin weighing 2 ounces. 2. An instrument for making angular measurements, esp. of the altitude of celestial or distant terrestrial objects, consisting of a graduated arc, originally of one-sixth of a circle (60 degrees), and a means of sighting the object. Cf. quadrant n.¹ 7, octant n. 1a.Tycho Brahe, Astronomia instauratae mechanica (1598) sig. A4, states that he gave the name sextans to this instrument. Later the principle of double reflection was used to produce the marine sextant, which measured up to 120 degrees and became the main instrument for navigation.air-, bubble sextant: see the first element. ΘΚΠ the world > relative properties > number > geometry > shape or figure > [noun] > two-dimensional > figure forming part of circle nook cantle1551 quadrate1551 quadrant1559 section1570 sector1570 segment1570 sextant1628 half-round1718 octant1753 society > travel > travel by water > vessel, ship, or boat > equipment of vessel > navigational aids > [noun] > quadrant, sextant, etc. quadrant?c1400 quadrate1551 sextant1628 sinical quadrant1669 bow1696 pig yoke1836 hog yoke1897 ham-bone1938 the world > the universe > cosmology > science of observation > astronomical instruments > measuring altitude > [noun] > quadrant or sextant > sextant sextant1628 ham-bone1938 1628 R. Burton Anat. Melancholy (ed. 3) ii. ii. iv. 264 To examine and calculate the motions of the Planets,..by those curious helps of glasses, astrolabes, sextantes, quadrants. 1674 R. Hooke Animadversions Machina Cœlestis 16 The second Instrument, which..he describes, is a Sextant of Brass. 1726 J. Swift Gulliver II. iii. iii. 37 Stored with great variety of Sextants, Quadrants, Telescopes..and other Astronomical Instruments. 1774 M. Mackenzie Treat. Maritim Surv. 32 Hold the Sextant vertically, and direct the Sight to some Object in the Horizon, or between you and the Sky, under the Sun. 1828 Moore's Pract. Navigator (ed. 20) 156 Hadley's Sextant is constructed on the same principles as the Quadrant; but..the Arch is extended to 120°..; it is also provided with some appendages not generally annexed to a Quadrant. 1860 C. Dickens Let. 23 Sept. (1997) IX. 315 His sextant (which is about the size and shape of a cocked hat), on being applied to his eye, entirely concealed him. 1868 J. N. Lockyer Elem. Lessons Astron. §520 If we require to measure simply the angular distance of one celestial body from another, we employ a sextant. 1941 C. Beaton Diary Apr. in Self Portrait with Friends (1979) xi. 87 The navigator is laying out his chart, adjusting his astrograph, arranging his sextant and numerous papers and bundles into position. 1969 Jrnl. Inst. Navigation 22 489 The Kollsman KS.85 photo-electric sextant could prove a valuable asset in such an area to ensure the bounding of heading and position errors inherent in automatic D.R. systems if a navigator is not carried. 2000 J. Griffiths Grip on Thin Air 51 Two stems of couch-grass angle like a sextant. †3. The sixth part of a circle; = sextans n. 2. Obsolete. rare. ΘΚΠ the world > relative properties > number > geometry > curve > [noun] > part of circle arc1570 sextans1596 circumference1656 quadrant1660 quintant1684 sextant1730 octant1753 supplemental arc1754 multiple arc1802 explement1817 1730 N. Bailey et al. Dictionarium Britannicum Sextant, with Mathematicians is the 6th Part of a Circle, or an Arch comprehending 60 Degrees. 4. Astronomy. (The English name of) the constellation Sextans.Chiefly as a conscious translation. ΘΚΠ the world > the universe > constellation > Southern constellations > [noun] > Sextans sextant1742 1742 R. Long Astron. I. ii. ii. 175 Hevelius's constellations made out of unformed stars... Sextans..the Sextant. 1795 C. Hutton Math. & Philos. Dict. Sextans, the Sextant, in Astronomy, a new constellation, placed across the equator, but on the south side of the ecliptic. 1875 Encycl. Brit. II. 817/1 The constellations added by Hevelius are the following..:——..10. Sextans, The Sextant. 1944 Science 20 Oct. 10/1 Amateurs interested in rediscovering Comet Berry..should search in the constellations of Crater, the cup, Leo, the lion, and Sextans, the sextant. 2007 Daily Tel. (Nexis) 1 Jan. 22 The winter constellations of Hydra, the Water Snake, and Sextans, the Sextant, appear almost empty and get little publicity. 5. Botany. Each of a group of six cells or segments. ΘΚΠ the world > life > biology > substance > cell > types of cells > [noun] > other types of cells reticular cell1832 torula1833 reserve cell1842 subcell1844 parenchyma cell1857 pedicel cell1858 nettle cell1870 heterocyst1872 prickle cell1872 angioblast1875 palisade cell1875 sextant1875 spindle cell1876 neuroblast1878 body cell1879 plasma cell1882 reticulum cell1882 stem cell1885 Langhans1886 basal cell1889 pole cell1890 myelocyte1891 statocyst1892 mast cell1893 thrombocyte1893 iridocyte1894 precursor1895 nurse cell1896 amacrine1900 statocyte1900 mononuclear1903 oat cell1903 myeloblast1904 trochoblast1904 adipocyte1906 polynuclear1906 fibrocyte1911 akaryote1920 Rouget cell1922 Sternberg–Reed1922 amphicyte1925 monoblast1925 pericyte1925 promyelocyte1925 pituicyte1930 agamete1932 sympathogonia1934 athrocyte1938 progenitor1938 Reed–Sternberg cell1939 submarginal1941 delta cell1942 mastocyte1947 squame1949 podocyte1954 transformed cell1956 transformant1957 spheroplast1958 pinealocyte1961 immunocyte1963 lactotroph1966 mammotroph1966 minicell1967 proheterocyst1970 myofibroblast1971 cybrid1974 the world > plants > part of plant > cell or aggregate tissue > [noun] > cell > types of > other types bast cell1842 basal cell1846 pollen cell1857 companion cell1859 segment1862 pollen mother cell?1870 sextant1875 transfusion cell1875 idioblast1882 trichoblast1882 symplast1894 megasporocyte1924 oat cell1940 heterokaryon1945 1875 A. W. Bennett & W. T. T. Dyer tr. J. von Sachs Text-bk. Bot. 122, 123 The section of the stem now appears as if composed of six cells or sextants [Ger. Sextanten], whose walls are placed nearly radially, forming a six-rayed star... Hence the walls..are called sextant-walls... The sextant-cells are still further broken up. 1884 F. O. Bower & D. H. Scott tr. H. A. de Bary Compar. Anat. Phanerogams & Ferns 19 Then follows in each of these the division into alternately dissimilar sextants. 1933 Bot. Gaz. 94 484 The remaining large sextant divides once, forming an inner lignified metaxylem cell and a protoxylem cell. 1962 Bot. Gaz. 124 137/1 The endodermal initial cells (except those that form secondary root initials at this sextant stage) undergo only radial divisions. 1993 Amer. Jrnl. Bot. 80 472/2 Nägeli and Leitgeb (1868) were concerned with finding the early formation of sextants in roots of vascular cryptogams. This entry has been updated (OED Third Edition, December 2008; most recently modified version published online March 2022). < n.1601
随便看	infra-specific infra-umbilical infraannuated infraatomic infraaxillary infrabasal infrabass infrabestial infrabranchial infrabuccal infracalicular infracephalic infrachristian infraclavicle infraclavicular infraclavicular bone infraclavicular region infraconstrictor infracortical infracostal infracostal artery infracostal muscles infract infracted infractible