extine

[ ek-steen, -stahyn ]

noun

, Botany.

1. exine.

extine

/ -taɪn; ˈɛkstɪn; -tiːn /

noun

1. another name for exine

extine

/ ĕk′stēn′,-stīn′ /

1. See exine

Word History and Origins

Origin of extine¹

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

Word History and Origins

Origin of extine¹

C19: from Latin extimus outermost + -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