Ceph`a*las"pis\, n. [NL., fr. Gr. ? head + ? a shield.] (Paleon.) 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.
Webster's Revised Unabridged Dictionary, © 1996, 1998 MICRA, Inc.
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