enneapetalous

from The Collaborative International Dictionary of English v.0.48

Enneapetalous \En`ne*a*pet"al*ous\, a. [Gr. 'enne`a nine + E.
   petalous: cf. F. enn['e]ap['e]tale.] (Bot.)
   Having nine petals, or flower leaves.
   [1913 Webster]