cormidium

noun
cor·​mid·​i·​um | \ kȯrˈmidēəm\
plural cormidia\ -​ēə \

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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History and Etymology for cormidium

New Latin, from Greek kormos tree trunk + New Latin -idium

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