Thermic \Ther"mic\, a. [Gr. ? heat.] Of or pertaining to heat; due to heat; thermal; as, thermic lines. {Thermic balance}. See {Bolometer}. {Thermic fever} (Med.), the condition of fever produced by sunstroke. See {Sunstroke}. {Thermic weight}. (Mech.) Same as {Heat weight}, under {Heat}.