Le Chatelier's principle

noun

Le Cha·​te·​lier's principle lə-ˌshät-əl-ˈyāz- 

: a statement in physics and chemistry: if the equilibrium of a system is disturbed by a change in one or more of the determining factors (as temperature, pressure, or concentration) the system tends to adjust itself to a new equilibrium by counteracting as far as possible the effect of the change

called also Le Chatelier's law