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macrospore

American  
[mak-ruh-spawr, -spohr] / ˈmæk rəˌspɔr, -ˌspoʊr /

noun

Botany.
  1. megaspore.


macrospore British  
/ ˈmækrəʊˌspɔː /

noun

  1. another name for megaspore

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Etymology

Origin of macrospore

First recorded in 1855–60; macro- + -spore

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.

See Examples For:

L, young plant, with the attached macrospore, × 6. r, the first root. l, the first leaves.

From Elements of Structural and Systematic Botany For High Schools and Elementary College Courses by Campbell, Douglas Houghton

In the full-grown ovule the macrospore, which in the seed plants is generally known as the “embryo sac,” is completely filled with the prothallium or “endosperm.”

From Elements of Structural and Systematic Botany For High Schools and Elementary College Courses by Campbell, Douglas Houghton

The germination of the macrospore consists in the repeated division of its nucleus to form two groups of four, one group at each end of the embryo-sac.

From Encyclopaedia Britannica, 11th Edition, Volume 2, Part 1, Slice 1 by Various

But the formation of the macrospore or embryo-sac is simpler than the corresponding process in cryptogams.

From Scientific American Supplement, No. 531, March 6, 1886 by Various

The macrospore divides into two cells, a large lower one, and a smaller upper one.

From Elements of Structural and Systematic Botany For High Schools and Elementary College Courses by Campbell, Douglas Houghton

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