VERB (2)

1. cause to become an emulsion; make into an emulsion;

2. form into or become an emulsion;
- Example: "The solution emulsified"

The Collaborative International Dictionary of English v.0.48:

Emulsify \E*mul"si*fy\, v. t. [Emulsion + -fy.]
   To convert into an emulsion; to form an emulsion; to reduce
   from an oily substance to a milky fluid in which the fat
   globules are in a very finely divided state, giving it the
   semblance of solution; as, the pancreatic juice emulsifies
   the oily part of food.
   [1913 Webster]

WordNet (r) 3.0 (2006):

emulsify
    v 1: cause to become an emulsion; make into an emulsion [ant:
         demulsify]
    2: form into or become an emulsion; "The solution emulsified"
       [ant: demulsify]

Moby Thesaurus II by Grady Ward, 1.0:

58 Moby Thesaurus words for "emulsify":
   admix, alloy, amalgamate, beat up, bemingle, blend, churn, clabber,
   clot, coagulate, coalesce, colloid, colloidize, combine, commingle,
   commix, compose, compound, concoct, conglomerate, cream, curdle,
   emulsionize, fuse, hash, homogenize, immingle, immix, incrassate,
   inspissate, integrate, interblend, interlace, interlard,
   intermingle, intermix, intertwine, interweave, jell, jellify,
   jelly, jumble, knead, lopper, merge, mingle, mingle-mangle, mix,
   mix up, scramble, shuffle, stir up, syncretize, thicken,
   throw together, toss together, whip, work