The Collaborative International Dictionary
Papaveraceous
Papaveraceous \Pa*pav`er*a"ceous\, a. (Bot.) Of, pertaining to, or resembling, a natural family of plants ( Papaveraceae) of which the poppy, the celandine, and the bloodroot are well-known examples.
Wiktionary
papaveraceous
a. Of or pertaining to the poppy family ''Papaveraceae''.