Caloric comes from French calorique, coined by Lavoisier from Latin calor ('heat'), from calēre ('to be warm'). The historical trail runs through calor in Latin and calēre in Latin. Used as an adjective and noun, caloric now means "relating to heat or calories; an obsolete supposed fluid of heat", so the present definition can be read against the older forms and meanings. The same lexical family is also visible in derived forms such as calorically and related forms such as calorie, calorimeter, calorimetry, and calorific. The result is a borrowed or transmitted form whose modern spelling carries a compact record of its route into English.