proof spirit

noun

Definition of PROOF SPIRIT

: an alcoholic liquor or mixture of ethanol and water that contains 50 percent ethanol by volume at 60°F (16°C)

1712

Medical Dictionary

noun \ˈprüf-\

: an alcoholic liquor or mixture of alcohol and water containing 50 percent ethanol by volume at 60° F (15.6° C)

British : liquor that weighs ¹²⁄₁₃ of an equal measure of distilled water or contains 57.10 percent by volume of alcohol

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