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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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.
Only the large megaspore survives; it produces the female gametophyte, referred to as the embryo sac.
From Textbooks ● Jan. 1, 2015
One megaspore mother cell, or megasporocyte, undergoes meiosis in each ovule.
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
In the female cone, megaspore mother cells are present in the megasporangium.
From Textbooks ● Jan. 1, 2015
Embryo-sac, the name given to the megaspore of seed-plants.
From The New Gresham Encyclopedia Volume 4, Part 2: Ebert to Estremadura by Various
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