Definition of exine in English:

exine

Line breaks: exine
Pronunciation: /ˈɛksɪn
 
, -ʌɪn/

noun

Botany
  • The decay-resistant outer coating of a pollen grain or spore.
    More example sentences
    • Orbicules may be attached to the exine of the pollen grains.
    • Short elongated elements occur on the orbicule wall, similar to those present on the pollen exine.
    • This study concentrates on these parameters using purified exines (sporopollenin capsules) prepared from pine pollen, which consist of a central capsule and two lateral sacci.

Origin

late 19th century: perhaps from ex-2 'out' + Greek is, in- 'fibre'.

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