Definition of "quinoline" []

• An aromatic organic base, C9H7N, having a pungent tarlike odor, synthesized or obtained from coal tar, and used as a food preservative and in making antiseptics and dyes. (noun)

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.

• ""quinoline" were produced, at about half the price of quinine."
• "The additives assessed in the study included sodium benzoate, sunset yellow, carmoisine, ponceau 4R, tartrazine, quinoline yellow and allura red."
• "Those colors are Yellow No. 5 (tartrazine), Yellow No. 10 (quinoline yellow, not approved in the U.S.)"