Cephalaspis
Pronunciation : Ceph`a*las"pis
Part of Speech : n.
Etymology : [NL., fr. Gr. (Paleon.)
Definition : Defn: A genus of fossil ganoid fishes found in the old red sandstone or Devonian formation. The head is large, and protected by a broad shield-shaped helmet prolonged behind into two lateral points.
Source : Webster's Unabridged Dictionary, 1913