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.
One megaspore mother cell, or megasporocyte, undergoes meiosis in each ovule.
From Textbooks ● Jan. 1, 2015
A megaspore develops into a female gametophyte containing a haploid egg.
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
The megasporangium contains megaspore mother cells, which divide by meiosis to produce haploid megaspores.
From Textbooks ● Jan. 1, 2015
The megaspore 763 is filled with tissue as in typical Gymnosperms, and from some of the superficial cells 3 to 5 archegonia are developed, characterized by long multicellular necks.
From Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 7 "Gyantse" to "Hallel" 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.
