Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A crystalline organic acid, the trans-isomer of C4H4O4, found in various plants and produced synthetically and used mainly in resins, paints, varnishes, and inks, and as a flavoring and a mordant.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun organic chemistry an unsaturated organic dicarboxylic acid, HOOCCH=CHCOOH, the geometric isomer of maleic acid from which it may be prepared by heating; it is found in many plants, including fungi and mosses, and is essential in the chemistry of respiration; it has a number of industrial applications, and its esters, the fumarates are used in the treatment of psoriasis

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun a colorless crystalline acid with a fruity taste; used in making polyester resins

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[From New Latin Fūmāria, genus of herbaceous plants (from Late Latin fūmāria, fumitory, from Latin fūmus, smoke) + –ic.]

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