phlegm

Thick, sticky, stringy mucus secreted by the mucous membrane of the respiratory tract, as during a cold or other respiratory infection.

One of the four humors of ancient and medieval physiology, thought to cause sluggishness, apathy, and evenness of temper.

Sluggishness of temperament.

Calm self-possession; equanimity.

One of the four humors of which the ancients supposed the blood to be composed.