perigonn.¹

Brit.

/ˈpɛrᵻɡɒn/, U.S.

/ˈpɛrəˌɡɑn/

Forms: 1800s– perigon, 1800s– perigone Brit.

/ˈpɛrᵻɡəʊn/, U.S.

/ˈpɛrəˌɡoʊn/.

Origin: A borrowing from French. Etymon: French périgone.

Etymology: < French périgone (A. P. de Candolle Théorie élém. de la bot. (1813) 360) < scientific Latin perigonium perigonium n. Compare earlier perigonium n.

Botany.

1. The perianth (perianth n. 1b) of a flowering plant. Also: †the utricle of a sedge (obsolete). Cf. perigonium n. 1a.

ΘΚΠ

the world > plants > part of plant > reproductive part(s) > flower or part containing reproductive organs > [noun] > parts of > perianth

perianthium1806

perigonium1816

perianth1828

tepal1840

perigon1847

1847 C. C. Babington Man. Brit. Bot. 355 In the description of the Carices fruit must be understood to mean the nut or the capsule covered by the persistent bottleshaped perigone.

1862 T. Moore Field Botanist's Compan. 368 Eriocaulon—barren flowers central, the perianth 4–6-cleft... Fertile flowers in the circumference, the perigone deeply four-parted.

1880 A. Gray Struct. Bot. vi. §1 164 Floral Envelopes, Perianth, or Perigone, the floral leaves or coverings.

1909 New Phytologist 8 88 We may probably also attribute the presence of fruits of Arrhenatherum..and Rumex crispus..with fruiting perigon to the action of the wind.

1940 Bull. Torrey Bot. Club 67 176 Surrounding the base of the ovary is a perigon composed of diminutive tepals varying in number from three to about eight.

1966 Brittonia 18 325 The fact that Pisonia (Ceodes) umbellifera is absent from some suitable islands in the Pacific might be due to the large size of fruiting perigones.

1998 Internat. Jrnl. Plant Sci. 159 907/2 Staminate flowers consist of a central mass of stamens surrounded by a variously lobed perianth (perigon).

†2. The perigonium (perigonium n. 1b) of a bryophyte. Obsolete.

ΘΚΠ

the world > plants > particular plants > moss > [noun] > parts of

moutha1398

fimbria1752

calyptra1753

veil1760

lid1776

apophysis1785

operculum1788

peristoma1792

peristome1799

peristomium1806

hair-point1818

vaginula1818

perigynium1821

vaginule1821

gemma1830

paraphyllium1832

tympanum1832

perigon1857

pseudopodium1861

commissure1863

ocrea1863

cap1864

chaeta1866

struma1866

membranulet1891

pyxis1900

pseudopod1914

annulus-

the world > animals > invertebrates > subkingdom Metazoa > grade Diploblastica > phylum Coelenterata > [noun] > class Hydrozoa > member of order Hydroidea > gonophore > sac formed by outer parts of

perigon1857

1857 A. Henfrey Elem. Course Bot. 161 The circle of leaves, often confluent, surrounding it [sc. the vaginule or calyptra], form the perigone, perianth or involucel.

1861 R. Bentley Man. Bot. i. v. 375 Three or six small leaves..termed perigonial, and constituting collectively a perigone.

1889 A. W. Bennett & G. R. M. Murray Handbk. Cryptogamic Bot. 142 The male perianth or perigone is usually composed of broader, shorter, and thicker leaves..not unfrequently red.

This entry has been updated (OED Third Edition, December 2005; most recently modified version published online March 2022).

perigonn.²

Brit.

/ˈpɛrɪɡən/,

/ˈpɛrᵻɡɒn/, U.S.

/ˈpɛrəˌɡɑn/

Origin: A borrowing from Greek, combined with an English element. Etymons: peri- prefix, Greek γωνία.

Etymology: Irregularly < peri- prefix + ancient Greek γωνία angle (see -gon comb. form).

Geometry. Now disused.

The angle swept out by a line in turning once completely around one end as centre; an angle of 360 degrees, or four right angles.

ΘΚΠ

the world > relative properties > number > geometry > angle > [noun] > other angles

vertical angle?a1560

trient1563

vertical1728

recipient1811

perigon1868

steregon1881

1868 A. Sandeman Pelicotetics 304 A right angle is both one half of a hemiperigon or a hemisemiperigon, and one fourth of a perigon.

1892 G. B. Halsted Elem. Synth. Geom. 6 If we turn still more, until the moving ray has made a complete rotation..the angle is called a perigon.

1908 Amer. Math. Monthly 15 106 While the equation is general, the construction of the curve can be made only when the ratio of the given angle to the perigon is known.

1942 G. James & R. C. James Math. Dict. 11/1 Conjugate angles, two angles whose sum is a perigon; two angles whose sum is 360°.

This entry has been updated (OED Third Edition, December 2005; most recently modified version published online March 2022).

单词	perigon
释义	perigonn.¹ Brit. /ˈpɛrᵻɡɒn/, U.S. /ˈpɛrəˌɡɑn/ Forms: 1800s– perigon, 1800s– perigone Brit. /ˈpɛrᵻɡəʊn/, U.S. /ˈpɛrəˌɡoʊn/. Origin: A borrowing from French. Etymon: French périgone. Etymology: < French périgone (A. P. de Candolle Théorie élém. de la bot. (1813) 360) < scientific Latin perigonium perigonium n. Compare earlier perigonium n. Botany. 1. The perianth (perianth n. 1b) of a flowering plant. Also: †the utricle of a sedge (obsolete). Cf. perigonium n. 1a. ΘΚΠ the world > plants > part of plant > reproductive part(s) > flower or part containing reproductive organs > [noun] > parts of > perianth perianthium1806 perigonium1816 perianth1828 tepal1840 perigon1847 1847 C. C. Babington Man. Brit. Bot. 355 In the description of the Carices fruit must be understood to mean the nut or the capsule covered by the persistent bottleshaped perigone. 1862 T. Moore Field Botanist's Compan. 368 Eriocaulon—barren flowers central, the perianth 4–6-cleft... Fertile flowers in the circumference, the perigone deeply four-parted. 1880 A. Gray Struct. Bot. vi. §1 164 Floral Envelopes, Perianth, or Perigone, the floral leaves or coverings. 1909 New Phytologist 8 88 We may probably also attribute the presence of fruits of Arrhenatherum..and Rumex crispus..with fruiting perigon to the action of the wind. 1940 Bull. Torrey Bot. Club 67 176 Surrounding the base of the ovary is a perigon composed of diminutive tepals varying in number from three to about eight. 1966 Brittonia 18 325 The fact that Pisonia (Ceodes) umbellifera is absent from some suitable islands in the Pacific might be due to the large size of fruiting perigones. 1998 Internat. Jrnl. Plant Sci. 159 907/2 Staminate flowers consist of a central mass of stamens surrounded by a variously lobed perianth (perigon). †2. The perigonium (perigonium n. 1b) of a bryophyte. Obsolete. ΘΚΠ the world > plants > particular plants > moss > [noun] > parts of moutha1398 fimbria1752 calyptra1753 veil1760 lid1776 apophysis1785 operculum1788 peristoma1792 peristome1799 peristomium1806 hair-point1818 vaginula1818 perigynium1821 vaginule1821 gemma1830 paraphyllium1832 tympanum1832 perigon1857 pseudopodium1861 commissure1863 ocrea1863 cap1864 chaeta1866 struma1866 membranulet1891 pyxis1900 pseudopod1914 annulus- the world > animals > invertebrates > subkingdom Metazoa > grade Diploblastica > phylum Coelenterata > [noun] > class Hydrozoa > member of order Hydroidea > gonophore > sac formed by outer parts of perigon1857 1857 A. Henfrey Elem. Course Bot. 161 The circle of leaves, often confluent, surrounding it [sc. the vaginule or calyptra], form the perigone, perianth or involucel. 1861 R. Bentley Man. Bot. i. v. 375 Three or six small leaves..termed perigonial, and constituting collectively a perigone. 1889 A. W. Bennett & G. R. M. Murray Handbk. Cryptogamic Bot. 142 The male perianth or perigone is usually composed of broader, shorter, and thicker leaves..not unfrequently red. This entry has been updated (OED Third Edition, December 2005; most recently modified version published online March 2022). perigonn.² Brit. /ˈpɛrɪɡən/, /ˈpɛrᵻɡɒn/, U.S. /ˈpɛrəˌɡɑn/ Origin: A borrowing from Greek, combined with an English element. Etymons: peri- prefix, Greek γωνία. Etymology: Irregularly < peri- prefix + ancient Greek γωνία angle (see -gon comb. form). Geometry. Now disused. The angle swept out by a line in turning once completely around one end as centre; an angle of 360 degrees, or four right angles. ΘΚΠ the world > relative properties > number > geometry > angle > [noun] > other angles vertical angle?a1560 trient1563 vertical1728 recipient1811 perigon1868 steregon1881 1868 A. Sandeman Pelicotetics 304 A right angle is both one half of a hemiperigon or a hemisemiperigon, and one fourth of a perigon. 1892 G. B. Halsted Elem. Synth. Geom. 6 If we turn still more, until the moving ray has made a complete rotation..the angle is called a perigon. 1908 Amer. Math. Monthly 15 106 While the equation is general, the construction of the curve can be made only when the ratio of the given angle to the perigon is known. 1942 G. James & R. C. James Math. Dict. 11/1 Conjugate angles, two angles whose sum is a perigon; two angles whose sum is 360°. This entry has been updated (OED Third Edition, December 2005; most recently modified version published online March 2022). < n.¹1847n.²1868
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perigonn.1

perigonn.2

perigonn.¹

perigonn.²