Definition: Meaning of, British thermal unit in English to English dictionary.
Pronunciation:/ ˈbrɪtɪʃ ˈθəːm(ə)l ˈjuːnɪt /
noun
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Word Forms:
Singular
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British thermal unit
British thermal units
a unit of heat equal to the amount of heat required to raise one pound of water one degree Fahrenheit at one atmosphere pressure; equivalent to 251.997 calories