1570s (adj.), 1610s (n.), from Latin emulgentem (nominative emulgens), present participle of emulgere "to milk out, drain out" (see emulsion).
emulgent, e-mul′jent, adj. milking or draining out, chiefly referring to the action of the kidneys.
emulgent e·mul·gent (ĭ-mŭl'jənt)adj. Of or being a straining, extracting, or purifying process.