plural noun
Troch·​i·​dae | \ ˈträkəˌdē\

Definition of Trochidae

: a family of marine gastropod mollusks (suborder Rhipidoglossa) with a conical operculate shell flattened at the base and having an oblique aperture and a very lustrous nacreous lining — see top shell, trochus

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History and Etymology for Trochidae

New Latin, from Trochus, type genus + -idae

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