The Collaborative International Dictionary of English v.0.48:

Papaveraceae \Papaveraceae\ prop. n.
   A natural family of herbs or shrubs having milky and often
   colored juices and capsular fruits.

   Syn: family Papaveraceae, poppy family.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

Papaveraceae
    n 1: herbs or shrubs having milky and often colored juices and
         capsular fruits [syn: Papaveraceae, family
         Papaveraceae, poppy family]