• (n.) A white organic base, resembling morphine, and obtained from certain varieties of opium.
Lau'da·nine noun [ From Laudanum .] (Chemistry) A white organic base, resembling morphine, and obtained from certain varieties of opium. 
Type: Term Pronunciation: law′dă-nēn Definitions: 1. An isoquinoline alkaloid derived from the mother liquor of morphine; it causes tetanoid convulsions, with action similar to that of strychnine.