FLUX, in Medicine, an extraordinary issue or evacuation of some humour. Fluxes are various, and variously denominated, according to their seats or the humours thus voided; as a flux of the belly, uterine flux, hepatic flux, salival flux, &c. The flux of the belly is of four kinds, which have each their respective denominations, viz. the lientery, or fluxus lientericus; the celiac, or fluxus chylosus; the diarrhoea; and the dyseutery, or bloody flux. See MEDICINE INDEX.