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
Vocabulary lists containing megaspore
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.
A megaspore develops into a female gametophyte containing a haploid egg.
From Textbooks • Jan. 1, 2015
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 female gametophyte is formed from mitotic divisions of the megaspore, forming an eight-nuclei ovule sac.
From Textbooks • Jan. 1, 2015
The behaviour of the chromosomes in meiosis or reduction division both in the pollen mother-cells and in the megaspore mother-cells which give rise to the so-called embryo-sac are fully described by Gates.
From Hormones and Heredity by Cunningham, J. T.
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.
