<p><strong>Noun</strong></p><ul><li>Physical Chemistry.</li><li>Any colloidal suspension of a liquid in another liquid.</li><li>Such a suspension used in cosmetics.</li><li>Pharmacology.</li><li>A liquid preparation consisting of two completely immiscible liquids, one of which, as minute globules coated by a gum or other mucilaginous substance, is dispersed throughout the other: used as a means of making a medicine palatable.</li><li>Photography.</li><li>A composition sensitive to some or all of the actinic rays of light, consisting of one or more of the silver halides suspended in gelatin, applied in a thin layer to one surface of a film or the like.</li></ul>