1) Natural philosophy 2) Of a heat science 3) Physical science 4) Physics 5) Thermodynamical 1) Thermodynamical 
• (a.) Relating to thermodynamics; caused or operated by force due to the application of heat.
The word 'thermodynamic' comes from roots that mean 'heat' and 'motion'. In a chemical reaction where chemical bonds rearrange to give more stable products, the energy that was stored in the bonds will be released as heat. In many chemical reactions where there are a number of possible products, one will be the most stable (give the greatest releas...
Ther`mo·dy·nam'ic adjective [ Thermo- + dynamic .] (Physics) Relating to thermodynamics; caused or operated by force due to the application of heat. Thermodynamic function . 
[adj] - of or concerned with thermodynamics
thermodynamic 1. In physics, a description of supplying, using, or accepting energy. 2. Of or relating to thermodynamics.
thermodynamical adjective of or concerned with thermodynamics; `the thermodynamic limit`
is a branch of physics and of chemistry that studies the effects of changes in temperature, pressure, and volume on physical systems.