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Entry 3 senses · 2 variants Webster, 1913

Alkaloid

/(ăl"kȧ*loid)/ · Al·ka·loid · IPA /ˈæl.kə.lɔɪd/
01 a. Pertaining to, resembling, or containing, alkali.
  1. 1.
    Pertaining to, resembling, or containing, alkali.
  2. 2.
    of or pertaining to alkaloids.
02 n. An organic base, especially one of a class of nitrogen-containing substances occurring ready formed in the tissues of plants and the bodies…
  1. 1.
    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.(Chem.)