acceptor

noun

1. One who accepts.
2. One who accepts a draft or a bill of exchange; a drawee after he has accepted.
3. An atom or molecule which can accept an electron to form a chemical bond.
4. A transfer RNA molecule that can accept a specific amino acid
5. A chemical acceptor atom forming a positive hole in a semiconductor
6. A cluster of skin cells that respond to pain
7. A kind of finite-state machine whose binary output indicates whether or not a received input was accepted.