Source : Webster's Revised Unabridged Dictionary (1913)

Emulgent \E*mul"gent\, a. [L. emulgens, p. pr. of emulgere to
   milk out: cf. F. ['e]mulgent. So called because regarded by
   the ancients as straining out the serum, as if by milking,
   and so producing the urine.] (Anat.)
   Pertaining to the kidneys; renal; as, emulgent arteries and
   veins. -- n. An emulgent vessel, as a renal artery or vein.

Emulgent \E*mul"gent\, n. (Med.)
   A medicine that excites the flow of bile. [Obs.] --Hoblyn.