# Autonymy

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An expression (a word) used as its own proper name. Such a use of an expression is said to be autonymous (as distinct from its use in the ordinary sense). For instance, if one says "$x$ forms part of the equation $x+3=2$", then one is using $x$ as the name of the letter $x$, and is using "$x+3=2$" as the name of the expression $x+3=2$. If one says "12 is divisible by 2", then the term "12" is used in a non-autonymous manner (as the designation of an integer), while if one says "12 consists of two digits" one says the term "12" is used autonymously (as the name of itself).