exine

exine [ek-seen, -sahyn] WORD ORIGIN noun Botany. the outer coat of a spore, especially a pollen grain. Liberaldictionary.com

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Also extine. Origin of exine First recorded in 1880–85; ex-1 + -ine1 Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019 British Dictionary definitions for exine exine extine (ˈɛkstɪn, -tiːn, -taɪn) noun botany the outermost coat of a pollen grain or a sporeCompare intine Collins English Dictionary – Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 exine in Science exine [ĕk′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 The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.