Wentletrap \Wen"tle*trap`\, n. [D. wenteltrap a winding
staircase; cf. G. wendeltreppe.] [Obs.]
Any one of numerous species of elegant, usually white, marine
shells of the genus Scalaria, especially {Scalaria pretiosa},
which was formerly highly valued; -- called also {staircase
shell}. See {Scalaria}.
[1913 Webster]