(chemistry) A polymer of methacrylic acid

(inorganic chemistry) Any of several ill-defined polymers of orthophosphoric acid; they are viscous, hygroscopic liquids

(inorganic chemistry) Ordinary phosphoric acid, H₃PO₄

(chemistry) Any acid of the form H₂SₙO₆ having a chain of sulfur atoms

(chemistry) Any organic compound having multiple carboxylic acid functional groups

(chemistry) Any acid formed from a binary compound of hydrogen and a halogen

(obsolete, chemistry) Any of a series of condensation products of silicic acid

(obsolete, chemistry) Any of several complex acids containing multiple atoms of tungsten

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

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