The proper adjective expressing a well-known quality of the air or of other substances exciting one of… said of the human body when deprived of…

Extremely cold; devoid of heat (sometimes with connotations of death). Cf. stone-cold adj. at stone, n. compounds 3a(a). In later use chiefly literary…

As cold as clay: usually of a dead body. (Cf. clay, n. 3 4.)

of or exhibiting hypothermia.