Source : Webster's Revised Unabridged Dictionary (1913)

Acipenser \Ac`i*pen"ser\, n. [L., the name of a fish.]
   (Zo["o]l.)
   A genus of ganoid fishes, including the sturgeons, having the
   body armed with bony scales, and the mouth on the under side
   of the head. See {Sturgeon}.

Source : WordNet®

Acipenser
     n : type genus of the Acipenseridae: sturgeons [syn: {genus
         Acipenser}]