(organic chemistry) Any of many terpenoid acids produced by the resin ducts of conifers.

(organic chemistry) A yellowish resin acid isolated from rosin and used in varnishes and esters for plasticizers; C₁₉H₂₉COOH

(obsolete, organic chemistry) mandelic acid

(organic chemistry) 2-phenyl-2-hydroxyacetic acid, C₆H₅CH(OH)COOH; originally extracted from bitter almonds, it has antibacterial and bacteriostatic properties.

(biochemistry) A terpenoid best known as a plant hormone that inhibits seed germination and was once thought to be important in abscission.

(inorganic chemistry, chiefly Britain) Alternative spelling of thiosulfuric acid

(British spelling, chemistry) Alternative spelling of sulfonic acid

(inorganic chemistry, chiefly British spelling) Alternative spelling of sulfurous acid

plural of imidic acid

plural of carboxylic acid