—n. any aquatic coelenterate of the class Hydrozoa of mainly marine polyp or medusoid forms, including hydra and Portuguese man-of-war.
Etymology: mod.L Hydrozoa (as HYDRA, Gk zoion animal)
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noun
colonial coelenterates having the polyp phase dominant
• Syn: ↑hydroid
• Hypernyms: ↑coelenterate, ↑cnidarian
• Hyponyms: ↑planula, ↑hydra, ↑siphonophore, ↑sertularian
• Member Holonyms: ↑Hydrozoa, ↑class Hydrozoa
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I. \\| ̷ ̷ ̷ ̷|zōən\ adjective or hydrozoal \\-ōəl\ : of or relating to the Hydrozoa
II. noun
(-s)
: one of the Hydrozoa
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/huy'dreuh zoh"euhn/, n.
1. any freshwater or marine coelenterate of the class Hydrozoa, including free-swimming or attached types, as the hydra, in which one developmental stage, either the polyp or medusa, is absent, and colonial types, as the Portuguese man-of-war, in which both medusa and polyp stages are present in a single colony.
adj.
2. belonging or pertaining to the Hydrozoa.
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hydrozōˈan noun and adjective
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Main Entry: ↑hydro-
Useful english dictionary. 2012.