(organic chemistry) an aliphatic dicarboxylic acid, (CH₂)₈(COOH)₂, originally prepared from tallow; it is used in the manufacture of resins, plasticizers and polyester rubbers

(inorganic chemistry) One of several systematic acid names for water, H₂O.

(organic chemistry) A very-long-chain saturated fatty acid, CH₃(CH₂)₂₄COOH, found in beeswax and carnauba wax.

(dated, organic chemistry) phenol (C₆H₅OH)

any of the steroid acids produced by the liver, such as cholic acid, that occur in bile as sodium salts and serve to neutralize the contents of the stomach as they enter the duodenum and to aid the emulsification and absorption of fats

(chemistry) Any compound, of general formula HXⁿ⁺, which can be transformed into a conjugate base X⁽ⁿ⁻¹⁾⁺ by the loss of a proton.

(inorganic chemistry) A relatively unstable form of chromic acid, H₂Cr₂O₇, known only in solution or as its salts, the dichromates, from which it may be prepared.

(organic chemistry) An unsaturated organic acid, CH₃-CH=C(CH₃-COOH), found in angelica and having pharmacological uses; the trans- form is tiglic acid.

(organic chemistry) A long chain unsaturated fatty acid, CH₃(CH₂)₇CH=CH(CH₂)₁₁COOH, found in rapeseed and mustard seed oils; the cis- isomer is erucic acid, the trans- isomer is brassidic acid

(inorganic chemistry) A transparent, colourless to pale yellow, fuming corrosive liquid, HNO₃; a highly reactive oxidizing agent used in the production of fertilizers, explosives, and rocket fuels and in a wide variety of industrial processes; once called aqua fortis.