megaspore

[ meg-uh-spawr, -spohr ]
/ ˈmɛg əˌspɔr, -ˌspoʊr /
|

noun Botany.

the larger of the two kinds of spores characteristically produced by seed plants and a few fern allies, developing into a female gametophyte.Compare microspore.
the embryo sac of a flowering plant.

Nearby words

  1. megarectum,
  2. megaris,
  3. megaron,
  4. megascopic,
  5. megasporangium,
  6. megaspore mother cell,
  7. megasporocyte,
  8. megasporogenesis,
  9. megasporophyll,
  10. megass

Origin of megaspore

First recorded in 1885–90; mega- + spore

Also called macrospore.

Related formsmeg·a·spor·ic [meg-uh-spawr-ik, -spor-] /ˌmɛg əˈspɔr ɪk, -ˈspɒr-/, adjective

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for megaspore



British Dictionary definitions for megaspore

megaspore

/ (ˈmɛɡəˌspɔː) /

noun

Also called: macrospore the larger of the two types of spore produced by some spore-bearing plants, which develops into the female gametophyteCompare microspore (def. 1)
the cell in flowering plants that gives rise to the embryo sac
Derived Formsmegasporic, adjective

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

Word Origin and History for megaspore

megaspore

n.

1857, from mega- + spore.

Online Etymology Dictionary, © 2010 Douglas Harper

Science definitions for megaspore

megaspore

[ mĕgə-spôr ]

One of the two types of haploid spores produced by a heterosporous plant. Megaspores develop into female gametophytes and are usually larger than microspores.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.