Fissurella
Pronunciation : Fis`su*rel"la
Part of Speech : n.
Etymology : [NL., dim. of L. fissura a fissure.] (Zo?l.)
Definition : Defn: A genus of marine gastropod mollusks, having a conical or limpetlike shell, with an opening at the apex; -- called also keyhole limpet.
Source : Webster's Unabridged Dictionary, 1913