Pentamerus
Pronunciation : Pen*tam"e*rus
Part of Speech : n.
Etymology : [NL. See Pentamerous.] (Paleon.)
Definition : Defn: A genus of extinct Paleozoic brachiopods, often very abundant in the Upper Silurian. Pentamerus limestone (Geol.), a Silurian limestone composed largely of the shells of Pentamerus.
Source : Webster's Unabridged Dictionary, 1913