(organic chemistry) A carboxylic acid derived from phenanthrene extracted from plants of the family Aristolochiaceae; though sometimes used as a herbal remedy, it is a rodent carcinogen and can cause endemic nephropathy in humans.

(pharmacology) (3-amino-1-hydroxy-1-phosphono-)phosphonic acid—a bisphosphonate drug to inhibit bone loss.

A polyphenol antioxidant found in numerous fruits and vegetables including raspberries, strawberries, cranberries, walnuts, pecans, pomegranates and other plant foods.

(organic chemistry) A heterocyclic carboxylic acid, furan-2-carboxylic acid, obtained by the oxidation of furfural.

(organic chemistry) An aromatic dicarboxylic acid, benzene-1,4-dicarboxylic acid, used in the manufacture of polyesters

(organic chemistry) A white crystalline acid, tetrahydroxy-cyclohexanecarboxylic acid, obtained from cinchona bark, coffee beans and yerba mate; used as an astringent, and in the synthesis of pharmaceuticals

A name formerly given to vinegar.

(biochemistry, genetics) Any acidic, chainlike biological macromolecule consisting of multiple repeat units of phosphoric acid, sugar and purine and pyrimidine bases; they are involved in the preservation, replication and expression of hereditary information in every living cell

(inorganic chemistry) A strong acid made by dissolving the gas, hydrogen chloride, in water. It reacts with alkalis, bases and many metals to form chlorides; it has many industrial applications.

(British spelling, inorganic chemistry) A colourless highly corrosive liquid, H₂SO₄.