cormidium
noun
cor·mid·i·um
kȯrˈmidēəm
plural cormidia
-ēə
: 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
Word History
Etymology
New Latin, from Greek kormos tree trunk + New Latin -idium