Exine
[ek-seen, -sahyn] /ˈɛk sin, -saɪn/
noun, Botany.
1.
the outer coat of a spore, especially a pollen grain.
/ˈɛksɪn, -aɪn/
noun
1.
(botany) the outermost coat of a pollen grain or a spore Compare intine
exine
(ěk’sēn’, -sīn’)
The outer layer of the wall of a pollen grain. The exine is composed of the most durable organic polymer known, sporopollenin. Also called extine.
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