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Webster 1913 Edition
Laudanum
Lau′da-num
,Noun.
Tincture of opium, used for various medical purposes.
☞ A fluid ounce of American laudanum should contain the soluble matter of one tenth of an ounce avoirdupois of powdered opium with equal parts of alcohol and water. English laudanum should have ten grains less of opium in the fluid ounce.
U. S. Disp.
Webster 1828 Edition
Laudanum
LAUD'ANUM
,Noun.