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.
Calmness of temperament, composure; also seen negatively, sluggishness, indifference.
Viscid mucus produced by the body, later especially mucus expelled from the bronchial passages by coughing.
A watery distillation, especially one obtained from plant matter; an aqueous solution.
Doubt; the condition of being uncertain or without conviction.
A parameter that measures the dispersion of a range of measured values.
Something uncertain or ambiguous.