Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio.
a yellow-white, crystalline compound, AgBr, which becomes dark when exposed to light: the main salt used in photographic emulsions
Used by arrangement with John Wiley & Sons, Inc.
nounThe American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
A pale yellow crystalline compound, AgBr, that turns black on exposure to light and is used as the light-sensitive component on ordinary photographic film and plates.