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Any of various marine snails of the family Epitoniidae, having a tapering, usually white spiral shell, often with prominent varices.
[Dutch wenteltrap, spiral staircase, wentletrap, from Middle Dutch wendeltrappe : wendel, winding (from wenden, to wind) + trappe, stairs.]
(Animals) any marine gastropod mollusc of the family Epitoniidae, having a long pointed pale-coloured longitudinally ridged shell
[C18: from Dutch winteltrap spiral shell, from wintel, earlier windel, from wenden to wind + trap a step, stairs]
any of various marine gastropods of the family Epitoniidae, typically white with sharply defined axial ridges.
[1750–60; < Dutch wenteltrap, earlier wendeltrap spiral staircase =wend(en) to turn + frequentative -el- + trap trap1]