A purgative liquid medicine containing an infusion of senna and a variety of other ingredients (typically magnesium sulphate, liquorice, and herbs and spices); a dose of this.
Origin
Early 19th century.
Definition of black draught in US English:
black draught
(USblack draft)
noun
historical
A purgative liquid medicine containing an infusion of senna and a variety of other ingredients (typically magnesium sulphate, liquorice, and herbs and spices); a dose of this.