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.
[1913 Webster]