Trochus
Pronunciation : Tro"chus
Part of Speech : n.;
Etymology : [NL., fr. Gr. (Zo?l.)
Definition : Defn: Any one of numerous species of marine univalve shells belonging to Trochus and many allied genera of the family Trochid?. Some of the species are called also topshells.
pl. Trochi.
Source : Webster's Unabridged Dictionary, 1913