Goniatite
Pronunciation : Go"ni*a*tite
Part of Speech : n.
Etymology : [Gr. (Paleon.)
Definition : Defn: One of an extinct genus of fossil cephalopods, allied to the Ammonites. The earliest forms are found in the Devonian formation, the latest, in the Triassic.
Source : Webster's Unabridged Dictionary, 1913