(biochemistry) pyridine-3-carboxylic acid; together with nicotinamide is a part of the vitamin B complex

(organic chemistry) A saturated fatty acid, CH₃(CH₂)₁₂COOH, tetradecanoic acid, found in both animal and vegetable oils and fats; used in the manufacture of soap, cosmetics etc.

(inorganic chemistry) A weak acid, HNO₂, known only in solution, or as its salts and esters, the nitrites; it has a linear structure, H-O-N=O

(obsolete, inorganic chemistry) Hydrochloric acid. / A low grade, industrial grade or impure form of hydrochloric acid, often containing traces of iron.

(chemistry) A supposed acid formed from osmium tetroxide but known only as osmate salts.

(organic chemistry) An unsaturated fatty acid, having 18 carbon atoms and one double bond, found in olive oil and very many other vegetable and animal oils and fats; it is used for making soap, cosmetics etc.

(organic chemistry) octadecanoic acid; the most common saturated fatty acid; it is found in all animal and most vegetable oils and fats; it is used in the manufacture of soap etc.

(chemistry) a carboxylic acid derived from galactose by oxidation of the terminal CH₂OH to a COOH; it polymerizes to form pectic acid

(organic chemistry) an aliphatic carboxylic acid, CH₃(CH₂)₇COOH, nonanoic acid, used in the manufacture of plastics, pharmaceuticals etc

(biochemistry) one of the constituents of the citric acid cycle, formed by the oxidation of malic acid and via the transamination of aspartic acid; an intermediate in the synthesis of amino acids and the metabolism of carbohydrates