exine Syllabification: (ex·ine)Pronunciation: /ˈekˌsēn, -ˌsīn/Definition of exine noun Botany the decay-resistant outer coating of a pollen grain or spore. It typically bears a highly characteristic surface pattern that is used in palynology. Origin: late 19th century: perhaps from ex-2 'out' + Greek is, in- 'fiber'exine in other Oxford dictionaries Definition of exine in the British & World English dictionary
