Definition of Rissoidae
:a large family of marine and freshwater snails (suborder Taenioglossa) with a long snout, ciliated tentacles, and eyes on small prominences at the base of the tentacles — see rissoa
What's Trending Now
More Trending Words
Rissoidae
plural noun
Ris·soi·dae
\
rə̇ˈsōəˌdē
,
-sȯi(ˌ)dē
\
Read the Latest from M-W
There's more!
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 rissoidae
New Latin, from Rissoa, type genus + -idae
Seen and Heard
What made you want to look up Rissoidae? Please tell us where you read or heard it (including the quote, if possible).
Writing? Check your grammar now!