1. The branch of physicochemical science concerned with heat and energy and their conversions one into the other involving mechanical work. 2. The study of the flow of heat. [thermo- + G. dynamis, force]
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ther·mo·dy·nam·ics -iks n pl but sing or pl in constr
1) physics that deals with the mechanical action or relations of heat
2) thermodynamic processes and phenomena
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ther·mo·dy·nam·ics (thur″mo-di-namґiks) [thermo- + dynamics] the branch of science which deals with heat, energy, work, and the interconversion of these, and with related problems. See also under law.Medical dictionary. 2011.