sexinen.
/ˈnɛksɪn/, /ˈnɛksʌɪn/, /ˈnɛksiːn/, U.S. /ˈnɛksaɪn/, /ˈnɛksᵻn/ Botany.
In the wall of a pollen grain or spore: the outer layer of the exine, which has a distinctively sculptured surface. Cf. nexine n.
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
1948 G. Erdtman in Geologiska Föreningens i Stockholm Förhandlingar 70 267 (caption) The sculptured part of the exine: sexine (exinium sculpturatum).
1952 G. Erdtman Pollen Morphol. & Plant Taxon. (1966) I. 19 One of the basic elements of the sexine appears to consist of small drumstick-shaped rods..projecting at right angles from the nexine surface.
1975 Proc. Royal Soc. B. 190 282 Variable although the structure of pollen exines may be, one feature is repeatedly found throughout the angiosperms..namely a subdivision into an inner more or less continuous..nexine..and an overlying sculptured layer, the sexine, composed of radially directed rods or bacula.
2001 Ann. Bot. 88 1067/1 Exine sculpture differences show a generic consistency already recognized by Schulze.., with Alstroemeria having a striato-reticulate sexine and Bomarea a reticulate exine.
This is a new entry (OED Third Edition, December 2008; most recently modified version published online March 2022).
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n.1948