lomastome

lomastome, a. and n. Conch.

(ˈləʊməstəʊm)

[a. F. lomastome (Férussac), f. loma n.¹ + Gr. στόµα mouth.]

a. adj. The distinctive epithet of those groups of Helicidæ which have the peristome reflected. b. n. A member of any of these groups.

In recent Dicts.