cu·ne·ate 
(kynē-ĭt, -āt′)
(kynē-ĭt, -āt′)adj.
Wedge-shaped. Used especially to describe a leaf or petal base that is narrowly triangular.
[Latin cuneātus, past participle of cuneāre, to make wedge-shaped, from cuneus, wedge.]
cune·ate′ly adv.