The Collaborative International Dictionary of English v.0.48:

Enneandria \En`ne*an"dri*a\, n. [NL., fr. Gr. 'enne`a nine +
   'anh`r, 'andro`s, man, male: cf. F. enn['e]andrie.] (Bot.)
   A Linn[ae]an class of plants having nine stamens. Enneandrian