8 Words That Are Older Than You Think
hypothetical fluid in a now-discarded model of heat exchange, 1792, from French calorique, coined in this sense by Lavoisier, from Latin calorem "heat" (nominative calor; see calorie). The adjective is recorded from 1865.
caloric ca·lor·ic (kə-lôr'ĭk)
Of or relating to calories.
Of or relating to heat.