glaucine

from The Century Dictionary.

• Same as glaucescent.
• noun A colorless bitter alkaloid contained in the leaves of the horn-poppy, Glaucium Glaucium. It forms crystalline nacreous scales when deposited from water.

from the GNU version of the Collaborative International Dictionary of English.

• adjective Glaucous or glaucescent.
• noun (Chem.) An alkaloid obtained from the plant Glaucium flavum, as a bitter, white, crystalline substance.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun organic chemistry An alkaloid obtained from the plant Glaucium.