资料来源 : Webster's Revised Unabridged Dictionary (1913)

Obovate \Ob*o"vate\ a. [Pref. ob- + ovate.] (Bot.)
   Inversely ovate; ovate with the narrow end downward; as, an
   obovate leaf.

资料来源 : WordNet®

obovate
     adj : of a leaf shape; egg-shaped with the narrower end at the
           base