Heteracanth

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Heteracanth \Het"er*a*canth\, a. [Hetero- + Gr. ? a spine.]
     (Zool.)
     Having the spines of the dorsal fin unsymmetrical, or
     thickened alternately on the right and left sides.
     [1913 Webster]