One of the mysteries of the English language finally explained.
Originally in recipes or prescriptions: ‘it has been proved or tested’. Hence more generally, used as a formula of approval or recommendation, or to indicate a proven truth.
Proof or evidence; (also) something tried or proved, especially a remedy that has been tried and tested; a recommendation for this. Compare "probatum". Now archaic or historical.
Early 16th century; earliest use found in The Grete Herball. From classical Latin probātum est ‘it has been proved’, also ‘it has been approved’, impersonal perfect passive indicative of probāre. With use as noun compare probatum.
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