Referring to you car as your wheels is a synecdoche.
An example of a synecdoche is referring to a vehicle as "wheels," one policeman as "the police," cola as "Coke" and credit cards as "plastic."
Origin of synecdocheLME, altered (infl. by L) ; from synodoche ; from Medieval Latin sinodoche, for Classical Latin synecdoche ; from Classical Greek synekdoch?, literally , a receiving together ; from synekdechesthai, to receive together ; from syn-, together + ekdechesthai, to receive ; from ek-, from + dechesthai, to receive ; from Indo-European base an unverified form de?- from source decent
Origin of synecdocheMiddle English synodoches, from Medieval Latin synodoche, alteration of Latin synecdoch&emacron;, from Greek sunekdokh&emacron;, from sunekdekhesthai, to take on a share of : sun-, syn- + ekdekhesthai, to understand (ek-, out of; see eghs in Indo-European roots + dekhesthai, to take; see dek- in Indo-European roots).
- syn′ec·doch′ic , syn′ec·doch′i·cal
- (rhetoric) A figure of speech that uses the name of a part of something to represent the whole.
- (rhetoric) The use of this figure of speech; synecdochy.
From Latin synecdoche, from Ancient Greek ÏƒÏ…Î½ÎµÎºÎ´Î¿Ï‡Î® (sunekdokhe, “receiving together").