plural noun
Hy·​droi·​da | \ hīˈdrȯidə \

Definition of Hydroida

 (Entry 1 of 2)

: an order of Hydrozoa comprising forms alternating a well-developed asexual polyp generation with a generation of free medusae or of abortive medusoid reproductive structures on the polyps — see leptomedusae


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Definition of Hydroida (Entry 2 of 2)

taxonomic synonym of hydrozoa

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History and Etymology for Hydroida

Plural noun

New Latin, from Hydra, included genus + -oida

New Latin, from Hydra, included genus + -oida

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Dictionary Entries Near Hydroida



hydroid coral

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Cite this Entry

“Hydroida.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Hydroida. Accessed 1 Dec. 2021.

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