Origin of megaspore
Also called macrospore.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for megaspores
The megaspores are, of course, very much larger than the microspores.
The germination of the megaspores is started in the sporangium; at a certain point in their development they are shed.
The number of microspores produced is very large, but only four megaspores are borne in each megasporangium.
The megaspores bear hooks, and in this way the two processes become attached.
- 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
Word Origin and History for megaspores
Online Etymology Dictionary, © 2010 Douglas Harper
- 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.