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5 definitions found

From: DICT.TW English-Chinese Dictionary 英漢字典

 al·ka·loid /ˈælkəˌlɔɪd/

From: DICT.TW English-Chinese Medical Dictionary 英漢醫學字典

 al·ka·loid /ˈælkəˌlɔɪd/ 名詞

From: Webster's Revised Unabridged Dictionary (1913)

 Al·ka·loid Al·ka·loid·al a.
 1. Pertaining to, resembling, or containing, alkali.

From: Webster's Revised Unabridged Dictionary (1913)

 Al·ka·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.
 Note: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.

From: WordNet (r) 2.0

      n : natural nitrogen-containing bases found in plants