Source : Webster's Revised Unabridged Dictionary (1913)

Wedge-shaped \Wedge"-shaped`\, a.
   1. Having the shape of a wedge; cuneiform.

   2. (Bot.) Broad and truncate at the summit, and tapering down
      to the base; as, a wedge-shaped leaf.

Source : WordNet®

wedge-shaped
     adj 1: of a leaf shape; narrowly triangular, wider at the apex and
            tapering toward the base [syn: {cuneate}]
     2: shaped like a wedge [syn: {cuneal}, {cuneiform}]