What is "ranunculaceous"

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.

a. (context botany English) Of or pertaining to buttercups