https://doi.org/10.1351/goldbook.14329
Polymerization whereby monomer(s), initiator, dispersion medium, and possibly colloid stabilizer constitute initially an inhomogeneous system resulting in particles of colloidal dimensions containing the formed polymer.
Note: With the exception of mini-emulsion polymerization, the term "emulsion polymerization" does not mean that polymerization occurs in the droplets of a monomer emulsion.