Source : Webster's Revised Unabridged Dictionary (1913)

Mola \Mo"la\, n. (Zo["o]l.)
   See {Sunfish}, 1.

Molebut \Mole"but\, n. (Zo["o]l.)
   The sunfish ({Orthagoriscus}, or {Mola}). [Written also
   {molebat}.]

Source : WordNet®

mola
     n : among the largest bony fish; pelagic fish having an oval
         compressed body with high dorsal and anal fins and caudal
         fin reduced to a rudder-like lobe; worldwide in warm
         waters [syn: {ocean sunfish}, {sunfish}, {headfish}]