8 letters · 10 points in Scrabble
noun (chemistry) a colloid in which both phases are liquids
noun a light-sensitive coating on paper or film; consists of fine grains of silver bromide suspended in a gelatin
originBorrowed from French émulsion, from New Latin ēmulsiō, ēmulsiōnis, based on Latin ēmulgeō (“to milk out, extract”).
Etymology from Wiktionary, CC BY-SA 3.0