Definition of Goniatites
: a genus (the type of the family Goniatitidae) of ammonoids widespread in the Devonian and the Carboniferous and having a discoidal coiled shell with angular-lobed sutures
goniatitoidadjective or noun
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 goniatites
New Latin, irregular from Greek gōnia angle
Seen and Heard
What made you want to look up Goniatites? Please tell us where you read or heard it (including the quote, if possible).