cuneate

from WordNet (r) 3.0 (2006)

cuneate
    adj 1: (of a leaf shape) narrowly triangular, wider at the apex
           and tapering toward the base [syn: {cuneate}, {wedge-
           shaped}]

from The Collaborative International Dictionary of English v.0.48

Cuneate \Cu"ne*ate\ (k?"n?-?t), Cuneated \Cu"ne*a`ted\ (-?`tEd),
   a. [L.cuneatus, fr. cuneus a wege See{Coin}.]
   Wedge-shaped; (Bot.), wedge-shaped, with the point at the
   base; as, a cuneate leaf.
   [1913 Webster]