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
Love words? You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.
Start your free trial today and get unlimited access to America's largest dictionary, with:
- More than 250,000 words that aren't in our free dictionary
- Expanded definitions, etymologies, and usage notes
- Advanced search features
- Ad free!
Origin and Etymology of cormidium
New Latin, from Greek kormos tree trunk + New Latin -idium
Seen and Heard
What made you want to look up cormidium? Please tell us where you read or heard it (including the quote, if possible).