zeroth law thermodynamics

zeroth law of thermodynamics

[zeer-ohth]
noun
the principle that any two systems in thermal equilibrium with a third system are in thermal equilibrium with each other. Compare law of thermodynamics ( def 2 ).

Origin:
1955–60; zero + -th2

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zeroth law of thermodynamics

noun
the law that if two bodies are in thermal equilibrium with a third body then the first two bodies are in thermal equilibrium with each other 
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