Definition of papaveraceous in US English:

papaveraceous

adjective

Botany
  • Relating to or denoting plants of the poppy family (Papaveraceae).

    • ‘Among other criteria he saw some difficulty in finding a papaveraceous plant endemic to the tropical New Caledonia in the southern hemisphere.’
    • ‘The Papaveraceous plant Argemone mexicana is antifungal against Candida albicans, antibacterial against Escherichia coli.’

Origin

Mid 19th century: from modern Latin Papaveraceae (plural), based on Latin papaver ‘poppy’, + -ous.

Pronunciation

papaveraceous

/pəˌpavəˈrāSHəs/