单词	megaspore
释义	megaspore noun mega·​spore ˈme-gə-ˌspȯr  : a spore in heterosporous plants giving rise to female gametophytes and usually larger than a microspore megasporic ˌme-gə-ˈspȯr-ik  adjective Example Sentences 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 Word History Etymology mega- + -spore First Known Use 1857, in the meaning defined above Medical Definition megaspore noun mega·​spore ˈmeg-ə-ˌspō(ə)r, -ˌspȯ(ə)r  1 : a spore in heterosporous plants that gives rise to female gametophytes and is generally larger than a microspore 2 : macrospore
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