Calorimetry

noun

1. Measurement of the amount of heat released or absorbed in a chemical reaction, change of state, or formation of a solution.
2. The measurement of the quantity of heat in thermal units (see thermal and calory) which a body absorbs or gives out in passing through a certain range of temperature, or in changing its state (as in fusion or vaporization), or the heat which is produced by chemical combination; the art or process of using the calorimeter.
3. Measurement of the quantities of heat in bodies.
4. The science of measuring the heat absorbed or evolved during the course of a chemical reaction or change of state.
5. A wide headband that covers the ears, for wearing on cold days.