formulation

(noun) a substance prepared according to a formula. Synonyms: preparation. Examples: "The physician prescribed a commercial preparation of the medicine."

(noun) inventing or contriving an idea or explanation and formulating it mentally. Synonyms: conceptualization, conceptualisation.

(noun) the style of expressing yourself. Synonyms: expression. Examples: "He suggested a better formulation." "His manner of expression showed how much he cared."