Alkaloid /(ăl"kȧ*loid)/

Al·ka·loid

Alkaloid

a.
  1. Pertaining to, resembling, or containing, alkali.
  2. of or pertaining to alkaloids.

Alkaloid

n.
  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.)