probatum est
/prəʊˌbeɪtəm ˈɛst/ /prəʊˌbɑːtəm ˈɛst/Now rare
noun
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.
noun
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.
Origin
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.