extine

American  

[ek-steen, -stahyn] / ˈɛk stin, -staɪn /

noun

Botany.

1. exine.

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extine British  

/ -taɪn, ˈɛkstɪn, -tiːn /

noun

1. another name for exine

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extine Scientific  

/ ĕk′stēn′,-stīn′ /

1. See exine

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Etymology

Origin of extine

1825–35; < Latin ext ( imus ) most outward + -ine ¹

Example Sentences

They increase in size and acquire a cell-wall, which becomes differentiated into an outer cuticular layer, or extine, and an inner layer, or intine.

From Project Gutenberg

Extine, outer coat of a pollen-grain.

From Project Gutenberg

The mature pollen-grain is, like other spores, a single cell; except in the case of some submerged aquatic plants, it has a double wall, a thin delicate wall of unaltered cellulose, the endospore or intine, and a tough outer cuticularized exospore or extine.

From Project Gutenberg