The Collaborative International Dictionary
Papaverous
Papaverous \Pa*pav"er*ous\, a.
Of or pertaining to the poppy; of the nature of the poppy.
--Sir T. Browne.
Wiktionary
papaverous
a. 1 Of, pertaining to, or characteristic of the poppy. 2 (context figuratively English) inducing sleep; soporific.