belonging to the Papaveraceae, the poppy family of plants.
Compare poppy family.
Origin of papaveraceous
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
of, relating to, or belonging to the Papaveraceae, a family of plants having large showy flowers and a cylindrical seed capsule with pores beneath the lid: includes the poppies and greater celandine
Word Origin for papaveraceous
C19: from New Latin, from Latin papāver poppy
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012