The Collaborative International Dictionary
Maleic
Maleic \Ma*le"ic\, a. [Cf. F. mal['e]ique. See Malic.] (Chem.) Pertaining to, or designating, an acid of the ethylene series (maleic acid), metameric with fumaric acid and obtained by heating malic acid.
Wiktionary
maleic
a. (context chemistry English) of, or relating to maleic acid or its derivatives