Source : Webster's Revised Unabridged Dictionary (1913)

Prepotent \Pre*po"tent\, a. [L. praepotens. See {Pre-}, and
   {Potent}.]
   1. Very powerful; superior in force, influence, or authority;
      predominant. --Plaifere.

   2. (Biol.) Characterized by prepotency. --Darwin.