wentletrap

noun

wen·​tle·​trap ˈwen-tᵊl-ˌtrap 

: any of a family (Epitoniidae) of marine snails with usually white shells

also : one of the shells

Illustration of wentletrap

Word History

Etymology

Dutch wenteltrap winding stair, from Middle Dutch wendeltrappe, from wendel turning + trappe stairs

First Known Use

1758, in the meaning defined above