'slit-shell' definitions:

Definition of 'slit-shell'

From: GCIDE

slit-shell \slit"-shell`\ (sl[i^]t"sh[e^]l`), n. (Zool.) Any species of Pleurotomaria, a genus of beautiful, pearly, spiral gastropod shells having a deep slit in the outer lip. Many fossil species are known, and a few living ones are found in deep water in tropical seas. [1913 Webster]