caloricityBiol.|kæləˈrɪsɪtɪ| [f. caloric n. + -ity: cf. F. caloricité.] The faculty in living beings of developing heat so as to maintain nearly the same temperature at all times. 1836–9Todd Cycl.Anat. II. 651/1 Caloricity or the power of evolving caloric.