. "B.Th.U."@en-us . "13726947-n"^^ . . "0"^^ . "British thermal unit"@en-us . . . "113726947"^^ . . . "112953656"@en-us . "BTU"@en-us . "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"@en-us . . . "British thermal unit"^^ . "0"^^ . . . .