1570s (adj.), 1610s (n.), from Latin emulgentem (nominative emulgens), present participle of emulgere "to milk out, drain out" (see emulsion).
Online Etymology Dictionary, © 2010 Douglas Harper
Examples from the Web for emulgent
Emulgent, e-mul′jent, adj. milking or draining out, chiefly referring to the action of the kidneys.
Of or being a straining, extracting, or purifying process.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.