megaspore
Americannoun
-
the larger of the two kinds of spores characteristically produced by seed plants and a few fern allies, developing into a female gametophyte.
-
the embryo sac of a flowering plant.
noun
-
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
-
the cell in flowering plants that gives rise to the embryo sac
Other Word Forms
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.
One megaspore mother cell, or megasporocyte, undergoes meiosis in each ovule.
From Textbooks ● Jan. 1, 2015
The megaspore divides three times to form an eight-cell stage.
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
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 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.
