exine

[ ek-seen, -sahyn ]
/ ˈɛk sin, -saɪn /

noun Botany.

the outer coat of a spore, especially a pollen grain.

Nearby words

  1. exiguously,
  2. exilarch,
  3. exile,
  4. exilic,
  5. eximious,
  6. exist,
  7. existence,
  8. existence theorem,
  9. existent,
  10. existential

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)

/ (ˈɛksɪn, -aɪn) /

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

Science definitions for exine

exine

[ ĕksēn′, -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.