exinen.

Brit.

/ˈɛksɪn/,

/ˈɛksʌɪn/,

/ˈɛksiːn/, U.S.

/ˈɛksᵻn/,

/ˈɛksaɪn/

Origin: A borrowing from German. Etymon: German Exine.

Etymology: < German Exine (C. J. P. Fritzche 1837, in Mémoires présentés à l'Académie impériale des sciences de St Petersbourg 3 676) < classical Latin ex- ex- prefix¹ + German -ine -ine suffix¹. Compare extine n., intine n.

Botany.

The resistant outer layer of the wall of a pollen grain. Cf. extine n.In angiosperms and gymnosperms, the exine typically contains the inert substance sporopollenin, and consists of an outer sculptured portion (sexine) and an inner non-sculptured portion (nexine).

ΘΚΠ

the world > plants > part of plant > reproductive part(s) > flower or part containing reproductive organs > [noun] > parts of > stamen or pistil > pollen and related parts

sandarac1623

globulet1671

powder1672

bread1682

farina1721

pollen1723

father-dust1728

rough wax1744

yellow rain1755

dust1776

fovilla1793

anther dust1797

pollen mass1828

pollen tube1830

intextine1835

pollen grain1835

pollen granule1835

exine1839

exintine1839

intine1839

pollinium1849

sulphur shower1854

pollinic mass1857

pollen chamber1863

smoke1868

pollen sac1872

pollinarium1881

sulphur rain1882

pollinic chamber1885

perine1895

pollen content1926

sculpturing1943

monad1947

nexine1948

sexine1948

1839 W. Francis tr. F. J. F. Meyen Rep. Progress Veg. Physiol. 74 Most frequently but two tunics occur, and they are termed the inner and the outer coat; but where a duplication of one or both these membranes exists these names do not suffice, and on that account he [sc. M. Fritzsche] proposes for the entire series of membranes, when they are all four present, the terms Intine, Exintine, Intexine, and Exine, which however cannot be admitted, for the fact is quite different to what M. Fritzsche supposes.

1887 A. B. Hervey tr. E. Strasburger Microscopic Bot. 296 The warty covering of the ripe pollen, the exine, will be stripped off.

1921 Bot. Gaz. 71 450 The new spore wall around the spore mother cells becomes thick and is differentiated into a thin intine and a heavy exine.

1973 Nature 8 June 342/1 The date of the appearance of marine grasses is not traceable by palynology because they produce pollen without exine, and so are not fossilized.

2002 Ann. Bot. 89 103/1 (caption) Pollen is triporate with a highly sculptured exine.

This entry has been updated (OED Third Edition, December 2015; most recently modified version published online March 2022).

单词	exine
释义	exinen. Brit. /ˈɛksɪn/, /ˈɛksʌɪn/, /ˈɛksiːn/, U.S. /ˈɛksᵻn/, /ˈɛksaɪn/ Origin: A borrowing from German. Etymon: German Exine. Etymology: < German Exine (C. J. P. Fritzche 1837, in Mémoires présentés à l'Académie impériale des sciences de St Petersbourg 3 676) < classical Latin ex- ex- prefix¹ + German -ine -ine suffix¹. Compare extine n., intine n. Botany. The resistant outer layer of the wall of a pollen grain. Cf. extine n.In angiosperms and gymnosperms, the exine typically contains the inert substance sporopollenin, and consists of an outer sculptured portion (sexine) and an inner non-sculptured portion (nexine). ΘΚΠ the world > plants > part of plant > reproductive part(s) > flower or part containing reproductive organs > [noun] > parts of > stamen or pistil > pollen and related parts sandarac1623 globulet1671 powder1672 bread1682 farina1721 pollen1723 father-dust1728 rough wax1744 yellow rain1755 dust1776 fovilla1793 anther dust1797 pollen mass1828 pollen tube1830 intextine1835 pollen grain1835 pollen granule1835 exine1839 exintine1839 intine1839 pollinium1849 sulphur shower1854 pollinic mass1857 pollen chamber1863 smoke1868 pollen sac1872 pollinarium1881 sulphur rain1882 pollinic chamber1885 perine1895 pollen content1926 sculpturing1943 monad1947 nexine1948 sexine1948 1839 W. Francis tr. F. J. F. Meyen Rep. Progress Veg. Physiol. 74 Most frequently but two tunics occur, and they are termed the inner and the outer coat; but where a duplication of one or both these membranes exists these names do not suffice, and on that account he [sc. M. Fritzsche] proposes for the entire series of membranes, when they are all four present, the terms Intine, Exintine, Intexine, and Exine, which however cannot be admitted, for the fact is quite different to what M. Fritzsche supposes. 1887 A. B. Hervey tr. E. Strasburger Microscopic Bot. 296 The warty covering of the ripe pollen, the exine, will be stripped off. 1921 Bot. Gaz. 71 450 The new spore wall around the spore mother cells becomes thick and is differentiated into a thin intine and a heavy exine. 1973 Nature 8 June 342/1 The date of the appearance of marine grasses is not traceable by palynology because they produce pollen without exine, and so are not fossilized. 2002 Ann. Bot. 89 103/1 (caption) Pollen is triporate with a highly sculptured exine. This entry has been updated (OED Third Edition, December 2015; most recently modified version published online March 2022). < n.1839
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