A shimmering atmospheric disturbance caused by currents of warm air between the observer and the object observed.

(thermodynamics) Any device which converts heat energy into mechanical work, by moving heat from a source to a sink.

(physics) The state of a thermodynamic system having reached a maximum entropy; temperature is uniform throughout, and no energy is available to do work.

(physics) The capability of a system to absorb heat energy; the amount of thermal energy required to raise the temperature of a system by one temperature unit without any change of phase.

(physics) the heat that is released or absorbed accompanying a change of state or of phase

(transitive) To enclose (something) in plastic wrapping and make an airtight seal by applying heat to fuse the edges of the wrapping together.

A device that transfers thermal energy between spaces, usually between an enclosed space and the outdoors.

plural of humid heat

(thermodynamics) An object, system or environment that absorbs and dissipates heat from objects in thermal contact (either direct or radiant) with it.

the heat capacity (specific heat) of humid air, expressed per unit mass of dry air in the mixture. The engineering symbol is cₛ.