Source : Webster's Revised Unabridged Dictionary (1913)

Triparted \Tri"part`ed\, a. [Pref. tri- + parted.]
   1. (Her.) Parted into three piece; having three parts or
      pieces; -- said of the field or of a bearing; as, a cross
      triparted.

   2. (Bot.) Divided nearly to the base into three segments or
      lobes.