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[ek-steen, -stahyn]
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noun Botany.
  1. exine.
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Origin of extine

1825–35; < Latin ext(imus) most outward + -ine1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for extine

Historical Examples

  • The pollen grain bears numerous spines, the dark spots indicate thin places in the extine.

    Encyclopaedia Britannica, 11th Edition, Volume 17, Slice 5


British Dictionary definitions for extine


  1. another name for exine
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Word Origin

C19: from Latin extimus outermost + -ine 1
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

extine in Science


[ĕkstēn′, -stīn′]
  1. See exine.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.