'Sea poppy' definitions:

Definition of 'sea poppy'

(from WordNet)
noun
Yellow-flowered Eurasian glaucous herb naturalized in along sandy shores in eastern North America [syn: horn poppy, horned poppy, yellow horned poppy, sea poppy, Glaucium flavum]

Definition of 'Sea poppy'

From: GCIDE
  • Sea poppy \Sea" pop"py\ (Bot.) The horn poppy. See under Horn. [1913 Webster]