accepter.

Finance . a person who accepts a draft or bill of exchange, esp. the drawee who signs the draft or bill, confirming a willingness to pay it when due.

Also called acceptor atom, acceptor impurity. Physics . an atom of impurity in a semiconducting crystal such that the atom can capture an electron, creating a hole in a filled electron shell and thereby changing the electric conductivity of the crystal.

Chemistry . an atom, ion, group of atoms, or compound that combines with, or accepts, another entity, thereby profoundly affecting physical and chemical properties

electron acceptor; water acceptor.