Any plant or species of the genus Papaver, herbs with showy polypetalous flowers and a milky juice. From one species (Papaver somniferum) opium is obtained, though all the species contain it to some extent; also, a flower of the plant. See Illust. of Capsule.
- Any of numerous plants of the genus Papaver, having nodding buds with four crumpled petals, showy red, orange, or white flowers, a milky juice, and capsules that dehisce through terminal pores.
- Any of several similar or related plants, such as the California poppy.
- An extract from the sap of unripe poppy seedpods, used in medicine and narcotics.
- A vivid red to reddish orange.