Rissoidae

plural noun

Ris·​soi·​dae

rə̇ˈsōəˌdē,

-sȯi(ˌ)dē

: 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

Word History

Etymology

New Latin, from Rissoa, type genus + -idae

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!