thermal - associated with or linked to heat; "thermal actions of molecules"; "thermal ability"; "thermic Strength"; "the caloric result of sunlight" dermal ectodermal endodermal epidermal epithermal geothermal hydrothermal intradermal isothermal mesodermal photothermal electrothermal See All Rhymes for thermal This molecular check out explains a lot. It tells us why https://mpi-thermal.com/blog/thermal-shock-vs-thermal-cycling-test/