le chatelier's principle

World English Dictionary
Le Chatelier's principle (lə ʃæˈtɛljeɪz)
 
n
chem the principle that if a system in chemical equilibrium is subjected to a disturbance it tends to change in a way that opposes this disturbance
 
[C19: named after H. L. Le Chatelier (1850--1936), French chemist]

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WordNet
le chatelier's principle

noun
the principle that if any change is imposed on a system that is in equilibrium then the system tends to adjust to a new equilibrium counteracting the change 
WordNet® 3.0, © 2006 by Princeton University.
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