a crystalline compound, now regarded as an ammonium salt of hydurilic acid, obtained by treating uramil with acid.

in thioformic acid, H2COS, a crystalline substance melting at 120°C.

Of, relating to, or derived from phthalic acid or phthalic anhydride; having a chemical structure formally related to that of phthalic acid.

designating an acid formed from an aldohexose by oxidation of the aldehyde group to a carboxyl group.

Resembling fumaric acid in having a trans configuration in geometrical isomerism.

Resembling maleic acid in having a cis configuration in geometrical (cis-trans) isomerism. Cf. fumaroid, adj.

Genetics. Involving or controlled by three genes.