bigeminateadj.

Brit.

/bʌɪˈdʒɛmᵻnət/, U.S.

/ˌbaɪˈdʒɛmənət/

Origin: Formed within English, by compounding; partly modelled on a Latin lexical item. Etymons: bi- comb. form, geminate adj.

Etymology: < bi- comb. form + geminate adj., in sense 1 after scientific Latin bigeminatus (1732 or earlier). Compare bigeminous adj., bigeminal adj.

1. Botany. Of a leaf: having a petiole that branches dichotomously, esp. with a single pair of leaflets on each secondary petiole; biconjugate. Now rare.

ΘΚΠ

the world > plants > part of plant > leaf > [adjective] > compound or lobed

cut1565

winged1668

pinnate1687

conjugated1690

trifoliated1698

auriculated1712

auriculate1714

pennate1723

pinnated1725

pennated1727

bigeminate1753

lyrated1753

pedated1753

pinnatifid1753

supradecomposite1753

supradecompound1753

ternated1753

trifoliate1753

lyrate1760

pedate1760

quinate1760

ternate1760

tripinnate1760

palmed1767

bilobated1770

lyre-shaped1778

pennatifid1778

finger-parted1783

superdecompound1783

bipinnate1785

biternate1785

conjugate1785

lobed1787

tergeminate1793

wing-cleft1796

yoked?1803

binate1807

septenate1807

trijugous1813

auricled1821

pinniform1821

multijugous1828

pinnulate1828

trifoliolate1828

bipinnatifid1830

multifoliolate1831

multijugate1831

quinquefoliolate1832

bifoliolate1835

pinnatisected1837

palmatifid1839

tripinnatifid1839

foliate1840

palmatipartite1840

pinnatilobate1840

pinnatipartite1840

pinnatisect1840

bipinnated1842

biconjugate1847

imparipinnate1847

paripinnate1851

pinnatulate1855

polytomous1856

multifoliate1857

pennati-partite1857

pennati-sected1857

ternato-pinnate1857

tripinnatisect1857

patentoternate1859

septemfoliate1859

bipinnatipartite1861

bipinnatisected1861

bipalmate1864

pinnatilobed1866

septenous1866

cut-leaved1870

lobing1870

ternatisect1870

tripinnated1876

trijugate1880

jugate1887

pinnulated1890

trisect1899

tridigitate1900

trigeminous1900

1753 Chambers's Cycl. Suppl. at Leaf Bigeminate Leaf, one formed of a double conjugation of lesser leaves.

1806 B. M'Mahon Amer. Gardener's Cal. 440 There are 84 species of Mimosa described; 2, with simple leaves, 6, with leaves simply pinnate; 3, with bigeminate or tergeminate leaves; [etc.].

1858 H. Drury Useful Plants India 264 Extreme branches pendulous, armed with short straight thorns: leaves bigeminate; leaflets oblong.

1972 D. Burger Seedlings of some Trop. Trees & Shrubs 21 A compound leaf can be doubly compound or several times compound (= decompound), for example..bipinnate or tripinnate, biparipinnate, bigeminate (= biconjugate) or bi-oddpinnate (= bi-imparipinnate).

2. Consisting of or occurring in pairs or two pairs; consisting of two similar parts; (Zoology) (in echinoderms) designating ambulacral pores arranged in two pairs; having such pores (cf. bigeminal adj. 1b).

ΚΠ

1826 Mem. Wernerian Nat Hist. Soc. 5 461 The [thecal] teeth, when 8, bigeminate.

1856 J. W. Griffith & A. Henfrey Micrographic Dict. 600/2 Teeth [of the peristome] thirty-two, connate, in eight bigeminate or sixteen geminate teeth.

1879 A. Napier tr. P. Guttmann Handbk. Physical Diagnosis 182 The cause of the bigeminate pulse has not yet been satisfactorily made out.

1901 Lancet 23 Nov. 1432/1 It is found in the red corpuscles usually in the form of a bigeminate or pear-shaped organism.

1911 Q. Jrnl. Zool. Soc. 67 674 The pores in each pair [of ambulacral plates] are bigeminate.

1912 F. Smith Man. Vet. Physiol. (ed. 4) p. xii The term ‘colliculi’ is now coming into use to denote the corpora quadrigemina. Its shortness is convenient, and it avoids confusion in the case of reptiles, birds, fish, etc., where these structures are bigeminate.

1980 M. K. Durkin in M. Jangoux Echinoderms: Present & Past i. 3/2 Trigeminate plates at ambitus; rest bigeminate.

2003 Cretaceous Res. 24 24/2 Ambulacra subambitally strongly widened with compound plates, bigeminate, occasionally trigeminate superambitally.

This entry has been updated (OED Third Edition, December 2008; most recently modified version published online December 2021).

单词	bigeminate
释义	bigeminateadj. Brit. /bʌɪˈdʒɛmᵻnət/, U.S. /ˌbaɪˈdʒɛmənət/ Origin: Formed within English, by compounding; partly modelled on a Latin lexical item. Etymons: bi- comb. form, geminate adj. Etymology: < bi- comb. form + geminate adj., in sense 1 after scientific Latin bigeminatus (1732 or earlier). Compare bigeminous adj., bigeminal adj. 1. Botany. Of a leaf: having a petiole that branches dichotomously, esp. with a single pair of leaflets on each secondary petiole; biconjugate. Now rare. ΘΚΠ the world > plants > part of plant > leaf > [adjective] > compound or lobed cut1565 winged1668 pinnate1687 conjugated1690 trifoliated1698 auriculated1712 auriculate1714 pennate1723 pinnated1725 pennated1727 bigeminate1753 lyrated1753 pedated1753 pinnatifid1753 supradecomposite1753 supradecompound1753 ternated1753 trifoliate1753 lyrate1760 pedate1760 quinate1760 ternate1760 tripinnate1760 palmed1767 bilobated1770 lyre-shaped1778 pennatifid1778 finger-parted1783 superdecompound1783 bipinnate1785 biternate1785 conjugate1785 lobed1787 tergeminate1793 wing-cleft1796 yoked?1803 binate1807 septenate1807 trijugous1813 auricled1821 pinniform1821 multijugous1828 pinnulate1828 trifoliolate1828 bipinnatifid1830 multifoliolate1831 multijugate1831 quinquefoliolate1832 bifoliolate1835 pinnatisected1837 palmatifid1839 tripinnatifid1839 foliate1840 palmatipartite1840 pinnatilobate1840 pinnatipartite1840 pinnatisect1840 bipinnated1842 biconjugate1847 imparipinnate1847 paripinnate1851 pinnatulate1855 polytomous1856 multifoliate1857 pennati-partite1857 pennati-sected1857 ternato-pinnate1857 tripinnatisect1857 patentoternate1859 septemfoliate1859 bipinnatipartite1861 bipinnatisected1861 bipalmate1864 pinnatilobed1866 septenous1866 cut-leaved1870 lobing1870 ternatisect1870 tripinnated1876 trijugate1880 jugate1887 pinnulated1890 trisect1899 tridigitate1900 trigeminous1900 1753 Chambers's Cycl. Suppl. at Leaf Bigeminate Leaf, one formed of a double conjugation of lesser leaves. 1806 B. M'Mahon Amer. Gardener's Cal. 440 There are 84 species of Mimosa described; 2, with simple leaves, 6, with leaves simply pinnate; 3, with bigeminate or tergeminate leaves; [etc.]. 1858 H. Drury Useful Plants India 264 Extreme branches pendulous, armed with short straight thorns: leaves bigeminate; leaflets oblong. 1972 D. Burger Seedlings of some Trop. Trees & Shrubs 21 A compound leaf can be doubly compound or several times compound (= decompound), for example..bipinnate or tripinnate, biparipinnate, bigeminate (= biconjugate) or bi-oddpinnate (= bi-imparipinnate). 2. Consisting of or occurring in pairs or two pairs; consisting of two similar parts; (Zoology) (in echinoderms) designating ambulacral pores arranged in two pairs; having such pores (cf. bigeminal adj. 1b). ΚΠ 1826 Mem. Wernerian Nat Hist. Soc. 5 461 The [thecal] teeth, when 8, bigeminate. 1856 J. W. Griffith & A. Henfrey Micrographic Dict. 600/2 Teeth [of the peristome] thirty-two, connate, in eight bigeminate or sixteen geminate teeth. 1879 A. Napier tr. P. Guttmann Handbk. Physical Diagnosis 182 The cause of the bigeminate pulse has not yet been satisfactorily made out. 1901 Lancet 23 Nov. 1432/1 It is found in the red corpuscles usually in the form of a bigeminate or pear-shaped organism. 1911 Q. Jrnl. Zool. Soc. 67 674 The pores in each pair [of ambulacral plates] are bigeminate. 1912 F. Smith Man. Vet. Physiol. (ed. 4) p. xii The term ‘colliculi’ is now coming into use to denote the corpora quadrigemina. Its shortness is convenient, and it avoids confusion in the case of reptiles, birds, fish, etc., where these structures are bigeminate. 1980 M. K. Durkin in M. Jangoux Echinoderms: Present & Past i. 3/2 Trigeminate plates at ambitus; rest bigeminate. 2003 Cretaceous Res. 24 24/2 Ambulacra subambitally strongly widened with compound plates, bigeminate, occasionally trigeminate superambitally. This entry has been updated (OED Third Edition, December 2008; most recently modified version published online December 2021). < adj.1753
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