macrospore

[ mak-ruh-spawr, -spohr ]

Phonetic (Standard)IPA

noun

, Botany.

macrospore

/ ˈmækrəʊˌspɔː /

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

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

The larger ones contain each a large spore, or macrospore; the smaller contain numerous microspores, immersed in mucilage.

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

The nucellus is a cellular tissue enveloping one large cell, the embryo-sac or macrospore.

April 19, 2024tortuous

[tawr-choo-uhs ]

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