A suspension of small globules of one liquid in a second liquid with which the first will not mix: an emulsion of oil in vinegar.
A photosensitive coating, usually of silver halide grains in a thin gelatin layer, on photographic film, paper, or glass.
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.