quantum sufficit
/ˌkwɒntəm ˈsʌfɪsɪt/Now rare
adverb
To a sufficient extent; moderately, only as much as required. In later use chiefly Science.
Origin
Late 17th century (in an earlier sense). From post-classical Latin quantum sufficit as much as suffices (3rd cent.; from 1565 in medical prescriptions) from quantum which amount + sufficit, 3rd singular present indicative of sufficere.