change - a relational difference between states; Specifically between states in advance of and after some function; "he attributed the change for their relationship" dermal ectodermal endodermal epidermal epithermal geothermal hydrothermal intradermal isothermal mesodermal photothermal electrothermal See All Rhymes for thermal 2. of, pertaining to, or of the character https://mpi-thermal.com