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A spore that gives rise to a female gametophyte and is larger than a microspore.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
1. (Botany) Also called: macrospore the larger of the two types of spore produced by some spore-bearing plants, which develops into the female gametophyte. Compare microspore1
2. (Botany) the cell in flowering plants that gives rise to the embryo sac
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
meg•a•spore(ˈmɛg əˌspɔr, -ˌspoʊr)
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.
meg`a•spor′ic (-ˈspɔr ɪk, -ˈspɒr-) adj.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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|Noun||1.||megaspore - larger of the two types of spore produced in heterosporous plants; develops in ovule into a female gametophyte|
spore - a small usually single-celled asexual reproductive body produced by many nonflowering plants and fungi and some bacteria and protozoans and that are capable of developing into a new individual without sexual fusion; "a sexual spore is formed after the fusion of gametes"
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