mega·​spore ˈme-gə-ˌspȯr How to pronounce megaspore (audio)
: a spore in heterosporous plants giving rise to female gametophytes and usually larger than a microspore
megasporic adjective

Examples of megaspore in a Sentence

Recent Examples on the Web Other fossilized finds include a pinecone-like structure with megaspores and some fossilized tree trunks used to estimate the height of the trees, Wang noted. Fox News, 9 Aug. 2019

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'megaspore.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History


mega- + -spore

First Known Use

1857, in the meaning defined above

Time Traveler
The first known use of megaspore was in 1857

Dictionary Entries Near megaspore

Cite this Entry

“Megaspore.” Dictionary, Merriam-Webster, Accessed 18 May. 2024.

Kids Definition


mega·​spore ˈmeg-ə-ˌspō(ə)r How to pronounce megaspore (audio)
: a plant spore that produces a female gametophyte

Medical Definition


: a spore in heterosporous plants that gives rise to female gametophytes and is generally larger than a microspore
megasporic adjective

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