Definition of Cephalaspis
: a genus (the type of the family Cephalaspidae) of Devonian ostracoderms having the head covered by a flattened shield rounded in front and prolonged into posteriorly directed lateral points and the eyes close together in the middle of the head shield — see cephalaspida
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 cephalaspis
New Latin, from cephal- + -aspis
Seen and Heard
What made you want to look up Cephalaspis? Please tell us where you read or heard it (including the quote, if possible).