Ranunculaceous \Ra*nun`cu*la"ceous\ (r[.a]*n[u^][ng]`k[-u]*l[=a]"sh[u^]s), a. [See {Ranunculus}.] (Bot.) Of or pertaining to a natural order of plants ({Ranunculace[ae]}), of which the buttercup is the type, and which includes also the virgin's bower, the monkshood, larkspur, anemone, meadow rue, and peony.