blastocoel

noun

blas·​to·​coel ˈbla-stə-ˌsēl How to pronounce blastocoel (audio)
variants or blastocoele
: the fluid-filled cavity of a blastula see blastula illustration
blastocoelic
ˌbla-stə-ˈsē-lik How to pronounce blastocoel (audio)
adjective

Word History

Etymology

blasto- + -coel

First Known Use

1875, in the meaning defined above

Time Traveler
The first known use of blastocoel was in 1875

Rhymes for blastocoel

See All Rhymes for blastocoel

Browse Nearby Words

Blastocladiales
blastocoel
blastocolla
See all Nearby Words

Cite this Entry

“Blastocoel.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/blastocoel. Accessed 7 Jul. 2026.

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Medical Definition

blastocoel

noun
blas·​to·​coel
variants or blastocoele
ˈblas-tə-ˌsēl How to pronounce blastocoel (audio)
: the cavity of a blastula

called also segmentation cavity

blastocoelic
ˌblas-tə-ˈsē-lik How to pronounce blastocoel (audio)
adjective

More from Merriam-Webster on blastocoel

Britannica.com: Encyclopedia article about blastocoel

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