The Collaborative International Dictionary of English v.0.48:

Mola \Mo"la\, n. (Zool.)
   See Sunfish, 1.
   [1913 Webster]

WordNet (r) 3.0 (2006):

mola
    n 1: 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, mola, headfish]