1) Genus of snails 2) Greek girl name 3) Neritid 4) Neritid gastropod 
Nerita is a genus of medium-sized to small sea snails with a gill and an operculum, marine gastropod molluscs in the family Neritidae, the nerites. This is the type genus of the family Neritidae. ==Distribution and habitat== Species of Nerita can be found worldwide in tropical waters in the middle and upper intertidal zones. They are gregarious he...
• (n.) A genus of marine gastropods, mostly natives of warm climates. • (n.) A genus of marine gastropods, mostly natives of warm climates.
Ne·ri'ta noun [ Latin , a sort of sea mussel, Greek ..., ....] (Zoology) A genus of marine gastropods, mostly natives of warm climates. 
[n] - having short a smooth or spirally ridged shell with thick usually toothed outer lip and toothed operculum
noun a neritid gastropod having a short smooth or spirally ridged shell with thick usually toothed outer lip and toothed operculum