local anesthetic

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun An anesthetic drug that induces local anesthesia by inhibiting nerve excitation or conduction.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun medicine An anesthetic that causes loss of sensation only to the area to which it is applied

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun anesthetic that numbs a particular area of the body