SG Heritage Dictionary

Acipenser [Adjective] Webster's Dictionary 1828

In ichthyology, a genus of fishes, of the order of chondropterygii, having an obtuse head; the mouth under the head, retractile and without teeth. To this genus belong the sturgeon, sterlet, huso, etc.

Acipenser [Noun] Webster's Dictionary 1913

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.