oospore

noun

oo·​spore ˈō-ə-ˌspȯr How to pronounce oospore (audio)
: a spore (as of a fungus) produced by heterogamous fertilization

Word History

Etymology

International Scientific Vocabulary

First Known Use

1865, in the meaning defined above

Time Traveler
The first known use of oospore was in 1865

Browse Nearby Words

Oospora
oospore
oosporiferous
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Cite this Entry

“Oospore.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/oospore. Accessed 11 Jul. 2025.

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Medical Definition

oospore

noun
oo·​spore ˈō-ə-ˌspō(ə)r, -ˌspȯ(ə)r How to pronounce oospore (audio)
: zygote
especially : a spore produced by heterogamous fertilization that yields a sporophyte

More from Merriam-Webster on oospore

Britannica.com: Encyclopedia article about oospore

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