ALKALOID
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{ Al"ka*loid (ăl"k&adot_;*loid), Al`ka*loid"al (ăl`k&adot_;*loid"&aitalic_;l), } a. [Alkali + -oid: cf. F. alcalo&ï;de.] 1. Pertaining to, resembling, or containing, alkali.
[1913 Webster]
2. of or pertaining to alkaloids.
[WordNet 1.5]
Al"ka*loid (ăl"k&adot_;*loid), n. (Chem.) An organic base, especially one of a class of nitrogen-containing substances occurring ready formed in the tissues of plants and the bodies of animals.
[1913 Webster]
&hand_; Alkaloids all contain nitrogen, carbon, and hydrogen, and many of them also contain oxygen. They include many of the active principles in plants; thus, morphine and narcotine are alkaloids found in opium.
[1913 Webster]
