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alkaloid
al·ka·loid [ álkə lòyd ] (plural al·ka·loids)


noun 
Definition:
 
alkaline compound found in plants: a group of nitrogen-containing compounds that are physiologically active as poisons or drugs
[Early 19th century. <alkali, because their chemical properties are similar to it]

al·ka·loid·al [ àlkə lóyd'l ] adjective
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