Source : Webster's Revised Unabridged Dictionary (1913)

Interosculant \In`ter*os"cu*lant\, a.
   1. Mutually touching or intersecting; as, interosculant
      circles.

   2. (Biol.) Uniting two groups; -- said of certain genera
      which connect family groups, or of species that connect
      genera. See {Osculant}.