The Collaborative International Dictionary
Eucrasy
Eucrasy \Eu"cra*sy\ [Gr. ?; ?, well-tempered; e'y^ well + ? to
mix, temper: cf. F. eucrasie.] (Med.)
Such a due mixture of qualities in bodies as constitutes
health or soundness.
--Quincy.
Wiktionary
eucrasy
n. (context medicine archaic English) A mixture of quality that constitutes health or soundness.