megaspores

megaspore

[meg-uh-spawr, -spohr]
noun Botany.
1.
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.
2.
the embryo sac of a flowering plant.
Also called macrospore.


Origin:
1885–90; mega- + spore

megasporic [meg-uh-spawr-ik, -spor-] , adjective
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World English Dictionary
megaspore (ˈmɛɡəˌspɔː)
 
n
1.  Compare microspore Also called: macrospore the larger of the two types of spore produced by some spore-bearing plants, which develops into the female gametophyte
2.  the cell in flowering plants that gives rise to the embryo sac
 
mega'sporic
 
adj

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
megaspore   (měg'ə-spôr)  Pronunciation Key 
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 © 2002. Published by Houghton Mifflin. All rights reserved.
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