[n] something regarded as a normative example; "the convention of not naming the main character"; "violence is the rule not the exception"; "his formula for impressing visitors"
[n] (mathematics) a standard procedure for solving a class of mathematical problems; "he determined the upper bound with Descartes' rule of signs"; "he gave us a general formula for attacking polynomials"
[n] a group of symbols that make a mathematical statement
[n] a conventionalized statement expressing some fundamental principle
[n] directions for making something
[n] a representation of a substance using symbols for its constituent elements
[n] a liquid food for infants