diametraladj.n.

/dʌɪˈamɪtrəl/

Etymology: < Old French dyametral (14th cent. in Godefroy Suppl.; modern French diamétral ), < medieval Latin diametrālis , < diametrus diameter n.: see -al suffix¹.

A. adj.

a. Of or relating to a diameter; of the nature of or constituting a diameter. diametral plane: (a) Geometry a plane passing through the centre of a sphere or other solid; (b) Crystallography a plane passing through two of the axes of a crystal (see diametric adj. 1).

ΘΚΠ

the world > relative properties > number > geometry > line > [adjective] > constituting a diameter

diametrical1553

diametral1555

semidiametral1678

diametric1868

1555 R. Eden tr. Peter Martyr of Angleria Decades of Newe Worlde i. ii. f. 6^v An other Ilande..whose Diametral syde extendynge frome the Easte to the weste, they iudged to bee a hundreth and fyftie myle.

1668 N. Culpeper & A. Cole tr. T. Bartholin Anat. (new ed.) ii. iii. 90 The Diametral wideness of the lower Belly.

1676 J. Moxon Regulæ Trium Ordinum 46 Through this Circle draw a..Diametral line.

1833 J. F. W. Herschel Astronomy iii. 151 In the orthographic projection, every point of the hemisphere is referred to its diametral plane or base.

1865 W. S. Aldis Elem. Solid Geom. (1886) vi. 85 The locus of the middle points of a system of parallel chords of a surface is called the diametral surface of the system.

1877 T. H. Huxley Man. Anat. Invertebrated Animals iii. 162 The diametral folds of the oral aperture.

1881 J. C. Maxwell Treat. Electr. & Magnetism (ed. 2) I. 12 A diameter of an ellipsoid and its conjugate diametral plane.

†b. Forming, or situated in, a straight line. Obsolete.

ΘΚΠ

the world > space > relative position > quality or fact of being in a line (with) > [adjective]

evenc1300

line-rightc1400

diametral1594

linable1698

allineated1759

collinear1863

in-line1961

1594 T. Blundeville Exercises iii. i. xv. f. 147^v When the Sunne, the earth, and the Moone be met in one selfe Diametrall line.

1647 H. More Philos. Poems i. i. xlvii The Sunne and Moon combine, Then they're at ods in site Diametrall.

†2. diametral number n. Arithmetic one that is the product of two factors the sum of whose squares is a square. (Cf. diameter n. 2d) Obsolete.Thus 3² + 4² = 5²; then 3 × 4 = 12 is a diametral number.

ΘΚΠ

the world > relative properties > number > mathematical number or quantity > [noun] > produced in a certain way > produced by two or more factors > the sum of whose square is a square

diametral number1557

diametrala1690

1557 R. Record Whetstone of Witte sig. Civ^v Diametralle nomber, is suche a number as hath twoo partes of that nature: that if thei bee multiplied together, thei will make the saied diametralle nomber: And the squares of those twoo partes, beeyng added together, will make a square nomber also: whose roote is the diameter to that diametralle nomber.

a1690 S. Jeake Λογιστικηλογία (1696) 179 Diametral numbers..are produced as Oblongs, by multiplying their proper parts together.

a1690 S. Jeake Λογιστικηλογία (1696) 181 All Diametral Numbers do set forth a Plain Rectangled Triangle, having all 3 Sides known.

†3. = diametrical adj. 2. Obsolete.

ΘΚΠ

the world > relative properties > relationship > contrariety or contrast > [adjective] > opposite or opposed

turneda1325

reversedc1390

contrary1413

opposeda1500

oppositea1513

inverted1563

counter1596

diametrical1613

contraposed1620

oppositive1622

averse1623

diagonial1624

contrarying1628

diametrala1631

conversive1636

Antipodian1640

converted1640

exadverse1647

Antarctic1651

Antipodean1651

antipodal1664

in reverse1694

contradictory1736

converse1794

antithesistic1801

contravening1802

diametric1802

reverse1828

polar1832

antipodist1844

antithetic1864

other-sided1879

antipodic1881

a1631 J. Donne Serm. (1955) II. 288 There is not so direct, and Diametrall a contrariety between the nature of any sinne and God, as between him and pride.

1641 Ld. J. Digby Speech in Comm. 21 Apr. 11 I see the best Lawyers in diametrall opposition.

1666 W. Sancroft Lex Ignea 22 Your own Oppositions direct and Diametral to God.

1768 Life Sir Barth. Sapskull I. 56 The genius of pleasure is a diametral contradiction to the spirit of trade and commerce.

†B. n. Obsolete.

1. A diametral line, diameter.

ΘΚΠ

the world > relative properties > number > geometry > line > [noun] > over circle or sphere

diameter1387

dimetient?a1560

beam1570

dimetient line1601

radiusa1657

diametral1658

ray1690

geodetic1850

geodesic1856

1658 Sir T. Browne Garden of Cyrus iii, in Hydriotaphia: Urne-buriall 152 The incession or locall motion of animals is made..by decussative diametrals, Quincunciall Lines and angles.

1676 J. Moxon Regulæ Trium Ordinum 47 Through the Diametral c, d, draw another Diametral line.

2. A diametral number: see A. 2.

ΘΚΠ

the world > relative properties > number > mathematical number or quantity > [noun] > produced in a certain way > produced by two or more factors > the sum of whose square is a square

diametral number1557

diametrala1690

a1690 S. Jeake Λογιστικηλογία (1696) 184 If 540, or 432, etc. be Diametrals, then 54,000 and 43,200 be the like.

This entry has not yet been fully updated (first published 1895; most recently modified version published online June 2021).

单词	diametral
释义	diametraladj.n. /dʌɪˈamɪtrəl/ Etymology: < Old French dyametral (14th cent. in Godefroy Suppl.; modern French diamétral ), < medieval Latin diametrālis , < diametrus diameter n.: see -al suffix¹. A. adj. 1. a. Of or relating to a diameter; of the nature of or constituting a diameter. diametral plane: (a) Geometry a plane passing through the centre of a sphere or other solid; (b) Crystallography a plane passing through two of the axes of a crystal (see diametric adj. 1). ΘΚΠ the world > relative properties > number > geometry > line > [adjective] > constituting a diameter diametrical1553 diametral1555 semidiametral1678 diametric1868 1555 R. Eden tr. Peter Martyr of Angleria Decades of Newe Worlde i. ii. f. 6^v An other Ilande..whose Diametral syde extendynge frome the Easte to the weste, they iudged to bee a hundreth and fyftie myle. 1668 N. Culpeper & A. Cole tr. T. Bartholin Anat. (new ed.) ii. iii. 90 The Diametral wideness of the lower Belly. 1676 J. Moxon Regulæ Trium Ordinum 46 Through this Circle draw a..Diametral line. 1833 J. F. W. Herschel Astronomy iii. 151 In the orthographic projection, every point of the hemisphere is referred to its diametral plane or base. 1865 W. S. Aldis Elem. Solid Geom. (1886) vi. 85 The locus of the middle points of a system of parallel chords of a surface is called the diametral surface of the system. 1877 T. H. Huxley Man. Anat. Invertebrated Animals iii. 162 The diametral folds of the oral aperture. 1881 J. C. Maxwell Treat. Electr. & Magnetism (ed. 2) I. 12 A diameter of an ellipsoid and its conjugate diametral plane. †b. Forming, or situated in, a straight line. Obsolete. ΘΚΠ the world > space > relative position > quality or fact of being in a line (with) > [adjective] evenc1300 line-rightc1400 diametral1594 linable1698 allineated1759 collinear1863 in-line1961 1594 T. Blundeville Exercises iii. i. xv. f. 147^v When the Sunne, the earth, and the Moone be met in one selfe Diametrall line. 1647 H. More Philos. Poems i. i. xlvii The Sunne and Moon combine, Then they're at ods in site Diametrall. †2. diametral number n. Arithmetic one that is the product of two factors the sum of whose squares is a square. (Cf. diameter n. 2d) Obsolete.Thus 3² + 4² = 5²; then 3 × 4 = 12 is a diametral number. ΘΚΠ the world > relative properties > number > mathematical number or quantity > [noun] > produced in a certain way > produced by two or more factors > the sum of whose square is a square diametral number1557 diametrala1690 1557 R. Record Whetstone of Witte sig. Civ^v Diametralle nomber, is suche a number as hath twoo partes of that nature: that if thei bee multiplied together, thei will make the saied diametralle nomber: And the squares of those twoo partes, beeyng added together, will make a square nomber also: whose roote is the diameter to that diametralle nomber. a1690 S. Jeake Λογιστικηλογία (1696) 179 Diametral numbers..are produced as Oblongs, by multiplying their proper parts together. a1690 S. Jeake Λογιστικηλογία (1696) 181 All Diametral Numbers do set forth a Plain Rectangled Triangle, having all 3 Sides known. †3. = diametrical adj. 2. Obsolete. ΘΚΠ the world > relative properties > relationship > contrariety or contrast > [adjective] > opposite or opposed turneda1325 reversedc1390 contrary1413 opposeda1500 oppositea1513 inverted1563 counter1596 diametrical1613 contraposed1620 oppositive1622 averse1623 diagonial1624 contrarying1628 diametrala1631 conversive1636 Antipodian1640 converted1640 exadverse1647 Antarctic1651 Antipodean1651 antipodal1664 in reverse1694 contradictory1736 converse1794 antithesistic1801 contravening1802 diametric1802 reverse1828 polar1832 antipodist1844 antithetic1864 other-sided1879 antipodic1881 a1631 J. Donne Serm. (1955) II. 288 There is not so direct, and Diametrall a contrariety between the nature of any sinne and God, as between him and pride. 1641 Ld. J. Digby Speech in Comm. 21 Apr. 11 I see the best Lawyers in diametrall opposition. 1666 W. Sancroft Lex Ignea 22 Your own Oppositions direct and Diametral to God. 1768 Life Sir Barth. Sapskull I. 56 The genius of pleasure is a diametral contradiction to the spirit of trade and commerce. †B. n. Obsolete. 1. A diametral line, diameter. ΘΚΠ the world > relative properties > number > geometry > line > [noun] > over circle or sphere diameter1387 dimetient?a1560 beam1570 dimetient line1601 radiusa1657 diametral1658 ray1690 geodetic1850 geodesic1856 1658 Sir T. Browne Garden of Cyrus iii, in Hydriotaphia: Urne-buriall 152 The incession or locall motion of animals is made..by decussative diametrals, Quincunciall Lines and angles. 1676 J. Moxon Regulæ Trium Ordinum 47 Through the Diametral c, d, draw another Diametral line. 2. A diametral number: see A. 2. ΘΚΠ the world > relative properties > number > mathematical number or quantity > [noun] > produced in a certain way > produced by two or more factors > the sum of whose square is a square diametral number1557 diametrala1690 a1690 S. Jeake Λογιστικηλογία (1696) 184 If 540, or 432, etc. be Diametrals, then 54,000 and 43,200 be the like. This entry has not yet been fully updated (first published 1895; most recently modified version published online June 2021). < adj.n.1555
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