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Definition of Btu abbreviation from the Oxford Advanced Learner's Dictionary

Btu

abbreviation
 
/ˌbiː tiː ˈjuː/
 
/ˌbiː tiː ˈjuː/
(also BTU)
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  1. British thermal unit
    (the amount of heat needed to raise one pound of water by one degree Fahrenheit, equal to 1.055 x 103 joules)
    • World energy use in 1970 was about 200 quadrillion Btu.
    The Btu is used as a unit of energy in the US and Canada but not (despite its name) in the UK.
See Btu in the Oxford Advanced American Dictionary
Check pronunciation: Btu

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