Definition of Polyplacophora
: an order of Amphineura comprising the chitons all of which have the foot occupying the whole ventral surface of the body and the shell composed of eight calcified dorsal plates
polyplacophoranadjective 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 polyplacophora
New Latin, from poly- + plac- + -phora
Seen and Heard
What made you want to look up Polyplacophora? Please tell us where you read or heard it (including the quote, if possible).