n (historical) One of the four humors making up the body in ancient and mediaeval medicine; said to be cold and moist, and often identified with mucus. (defdate|from 13th c.)
n viscid | Viscidmucus produced by the body, later especially mucus expelled from the bronchial passages by coughing. (defdate|from 14th c.)
n (historical|chemistry|alchemy) A watery distillation, especially one obtained from plant matter; an aqueous solution. (defdate|from 16th c.)