megaspore
Americannoun
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the larger of the two kinds of spores characteristically produced by seed plants and a few fern allies, developing into a female gametophyte.
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the embryo sac of a flowering plant.
noun
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Also called: macrospore. the larger of the two types of spore produced by some spore-bearing plants, which develops into the female gametophyte Compare microspore
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the cell in flowering plants that gives rise to the embryo sac
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Etymology
Origin of megaspore
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Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
The megaspore mother cell divides by meiosis to produce four haploid megaspores.
From Textbooks ● Jan. 1, 2015
When the pollen lands on a female scale, a pollen tube grows toward the female gametophyte, which consists of an ovule containing the megaspore.
From Textbooks ● Jan. 1, 2015
The megaspore mother cell is at the center.
From Textbooks ● Jan. 1, 2015
Only the large megaspore survives; it produces the female gametophyte, referred to as the embryo sac.
From Textbooks ● Jan. 1, 2015
For an account of the further development of the megaspore, and the formation of the egg-cell, from which after fertilization is formed the embryo, see Gymnosperms and Angiosperms.
From Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 5 "Fleury, Claude" to "Foraker" by Various
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
