Definition of cormidium
: the entire body or colony of a compound animal; sometimes : one of the clusters of zooids usually consisting of a helmet-shaped bract, a gastrozooid, and one or more gonophores often functioning as swimming bells and arising from the main stem of a calycophoran —used chiefly of the Siphonophora
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Origin and Etymology of cormidium
New Latin, from Greek kormos tree trunk + New Latin -idium
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