wentletrap
/ˈwentltræp/noun
1- a marine mollusc which has a tall spiral shell with many whorls that are ringed with oblique ridges梯螺。亦称 STAIRCASE SHELL.
1.1
- Family Epitoniidae, class Gastropoda: numerous species, including the European common wentletrap (Clathrus clathrus).梯螺科, 腹足纲：众多种, 包括欧洲的普通梯螺（拉丁名Clathrus clathrus）.
词源
mid 18th cent.: from Dutch wenteltrap, literally 'winding stair'.