9.2 Synecdoche

Synecdoche is a figure of speech in which a term is used in one of the following ways:
Part of something is used to refer to the whole thing (pars pro toto), or
A thing (a "whole") is used to refer to part of it (totum pro parte), or
A specific class of thing is used to refer to a larger, more general class, or
A general class of thing is used to refer to a smaller, more specific class, or
A material is used to refer to an object composed of that material, or
A container is used to refer to its contents.