Formulae

Part of speech: noun

Pronunciation: /ˈfɔː(ɹ).mjə.li/

Definitions

1. A set of symbols and numbers representing a mathematical relationship or a scientific principle or rule
2. Different configurations or expressions used to convey equations or models across various fields
3. A structured arrangement of variables and constants that provides a systematic way to solve problems or describe phenomena

Etymology: "Formulae" is the plural of "formula," a learned borrowing from Latin "formula," which was a diminutive of "forma," meaning "form" or "shape." The Latin word therefore began as a little shape or mould: a small pattern into which material was pressed. Its later senses of rule, principle and method grew out of that idea of a fixed pattern that reliably produces the same result. English speakers often use "formulae" and "formulas" interchangeably, but the two plurals have divided labour. The Latin-style "formulae" tends to appear in mathematics and science, where it refers to equations and symbolic expressions, while "formulas" is the everyday English plural. The original sense of a fixed mould survives in the way a mathematical formula is a pattern that can be stamped out again for any set of values.

Synonyms: equations, calculations, recipes, patterns, models