I am not interested to know whether vivisection produces results that are profitable to the human race...The pain which it inflicts upon unconsenting animals is the basis of my enmity toward it, and it is to me sufficient justification without looking further.
—Mark Twain
metonymy
A figure of speech in which one word is substituted for another with which it is closely associated. For example, in the expression The pen is mightier than the sword, the word pen is used for "the written word," and sword is used for "military power."