a. and sb. Bot. [ad. mod.L. līliālis, f. līlium LILY.] a. adj. Only in Lilial alliance: In Lindleys classification, the alliance or group of orders which includes the Liliaceæ. b. sb. A member of this alliance.
1846. Lindley, Veg. Kingd., 195. [Endogens.] Alliance XVI. Liliales.The Lilial Alliance . Natural Orders of Lilials.
1854. A. Adams, etc., Man. Nat. Hist., 501, II. OrderLilials (Liliales).