mayer

(thermodynamics) A unit of heat capacity equal to the heat capacity of a substance whose temperature is raised 1° Celsius by 1 joule.

[Etymology: J. R. von Mayer; Germany 1814-78] heat capacity (Metric) A scarcely used term = J·(g·K)^-1 (= 1 000 m²·s^-2·K^-1 in base terms).
[Richards T. W., Glucker T. F., J. Amer. Chem. Soc. Vol. 47, 1876-93 (1925)]