a Math., Physics, etc. A general rule, principle, or relationship expressed in symbols, often as an equation. L18. b Chem. An expression of the atomic constituents of a compound by means of symbols and figures. M19. c In general scientific use, a group of symbols or figures condensing a set of facts.

formulation n. (a)the action of formulating; (b)a material or mixture prepared according to a particular formula: L19. formulator n. E20.