rə̇ˈsōəˌdē, -sȯi(ˌ)dē noun plural
Usage: capitalized
Etymology: New Latin, from Rissoa, type genus + -idae
: 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