(chemistry) Alternative spelling of hyposulfurous acid

(inorganic chemistry) An unstable acid, H₂S₂O₃, formally derived from sulfuric acid by the substitution of a sulfur atom in the place of an oxygen one; it is known only in solution or as its salts and esters, the thiosulfates.

(chemistry, obsolete) Hydrocyanic acid.

(organic chemistry) an unsaturated organic dicarboxylic acid, HOOCCH=CHCOOH, the geometric isomer of fumaric acid; it is found in unripe fruit, and is used industrially in the production of polyester resins

(music) A style of music from the early rave scene in the UK.

(biochemistry) A nonessential amino acid, α-amino-glutaric acid, occurring widely in animal and plant tissues; the salt, monosodium glutamate is used as a flavour-enhancing seasoning.

(organic chemistry) an auxin plant hormone, synthesized in leaves, that stimulates growth, especially in the presence of ethylene

(chemistry) a weak, unstable acid, HOCl, known only in solution; it is made by the action of chlorine on water and, along with its salts, the hypochlorites, is used as a household bleach

(organic chemistry) A dicarboxylic acid, HOOC-(CHOH)₄-COOH, produced by the oxidation of the milk sugar galactose, used as a test for the presence of galactose and/or lactose.

(organic chemistry) a white crystalline dicarboxylic acid, CH₂(COOH)₂, used in making barbiturates