Source : Webster's Revised Unabridged Dictionary (1913)

Menobranch \Men"o*branch\, Menobranchus \Men`o*bran"chus\, n.
   [NL. menobranchus, fr. Gr. ? to remain + ? a gill.]
   (Zo["o]l.)
   A large aquatic American salamander of the genus {Necturus},
   having permanent external gills.