hydrogen acceptor

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a substance that unites with another substance.
hydrogen acceptor the molecule accepting hydrogen in an oxidation-reduction reaction.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

hy·dro·gen car·ri·er

a molecule that, in conjunction with a tissue enzyme system, carries hydrogen from one metabolite (oxidant) to another (reductant) or to molecular oxygen to form H2O.
Synonym(s): hydrogen acceptor
Farlex Partner Medical Dictionary © Farlex 2012

hydrogen acceptor

any substance (e.g. CYTOCHROME OXIDASE) that can become reduced by the addition of hydrogen, thus enabling the transfer and release of energy as in the ELECTRON TRANSPORT SYSTEM.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005