acceptor
noun
ac·cep·tor ik-ˈsep-tər 
ak-
1
: accepter sense 1
2
: one that accepts an order or a bill of exchange
3
: an atom, molecule, or subatomic particle capable of receiving another entity (such as an electron) especially to form a compound compare donor sense 3a
Example Sentences
Recent Examples on the Web Exposing the molecules to green light caused an electron to jump from the donor to the acceptor over a distance of about four nanometers. 
Henrik Mouritsen, Scientific American, 1 Apr. 2022 This gives exosomes an unrivalled ability to specifically target acceptor cells expressing particular surface antigens. Philip W. Askenase, Scientific American, 17 June 2020 Magee’s brainwave was to install a device that had a coin acceptor and a dial to engage a timing mechanism. Tony Borroz, WIRED, 13 May 2010
Henrik Mouritsen, Scientific American, 1 Apr. 2022 This gives exosomes an unrivalled ability to specifically target acceptor cells expressing particular surface antigens. Philip W. Askenase, Scientific American, 17 June 2020 Magee’s brainwave was to install a device that had a coin acceptor and a dial to engage a timing mechanism. Tony Borroz, WIRED, 13 May 2010 Word History
Etymology
Middle English acceptour (in the phrase acceptour of persones, translation of the Vulgate phrase personarum acceptor—Acts 10:34), borrowed from Latin acceptor, from accipere "to take, receive" + -tor, agent suffix — more at accept
First Known Use
1504, in the meaning defined at sense 1
Medical Definition
acceptor
noun
ac·cep·tor ik-ˈsep-tər, ak-
: an atom, molecule, or subatomic particle capable of receiving another entity (as an electron) especially to form a compound compare donor sense 2