The Collaborative International Dictionary
Iridaceous \Ir`i*da"ceous\, Irideous \I*rid"e*ous\, a. [From NL. Iris, Iridis, the Iris.] (Bot.) Pertaining to, or resembling, a large natural order of endogenous plants ( Iridace[ae]), which includes the genera Iris, Ixia, Crocus, Gladiolus, and many others.
a. (context botany English) Of or pertaining to the irises (of family ''Iridaceae'')
adj. of or pertaining to or characteristic of plants of the family Iridaceae