acceptor

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

• noun One who signs a draft or bill of exchange.
• noun Chemistry An atom that accepts or incorporates a part from a donor, especially an atom that incorporates electrons to form a bond with another atom.

from The Century Dictionary.

• noun Same as accepter, but more frequent in commercial and legal use.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Law & Com.) One who accepts.

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

• noun One who accepts.
• noun law, commerce One who accepts a draft or a bill of exchange; a drawee after he has accepted.
• noun chemistry An atom or molecule which can accept an electron to form a chemical bond.
• noun biochemistry A transfer RNA molecule that can accept a specific amino acid
• noun physics A chemical acceptor atom forming a positive hole in a semiconductor.

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

• noun the person (or institution) who accepts a check or draft and becomes responsible for paying the party named in the draft when it matures
• noun (chemistry) in the formation of a coordinate bond it is the compound to which electrons are donated