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maleic acid Syllabification: ma·le·ic ac·id
Pronunciation: /məˈlēik/ /-ˈlā-/

Definition of maleic acid in English:


A crystalline acid made by distilling malic acid and used in making synthetic resins.
  • Alternative name: cis-butenedioic acid; chemical formula: HOOCCHCHCOOH
Example sentences
  • Citric acid, maleic acid, and butanetetracarboxylic acid are the three agents used most often.
  • Moreover the molecules of maleic acid are polar and are easily hydrated by the polar water molecules.
  • If released into water, maleic acid will probably biodegrade based on the results of screening studies.


Pronunciation: /məˈlēˌāt/ /-ət/
Example sentences
  • The researchers were not very concerned about the occurrence of fumarate, which is the trans isomer of maleate, because the levels were relatively low.
  • It might be presumed that the other preparations available in the United States, methylergonovine maleate and ergonovine maleate, produce the same effects and outcomes.
  • Methylergonovine maleate should be restricted to use in refractory cases and should never be used for more than six months continuously.


Mid 19th century: maleic from French maléique, alteration of malique (see malic acid).

Definition of maleic acid in:
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