de·hy·dro·gen·ase 
(dē′hī-drŏjə-nās′, -nāz′, dē-hīdrə-jə-)
(dē′hī-drŏjə-nās′, -nāz′, dē-hīdrə-jə-)n.
An enzyme that catalyzes the removal of hydrogen from a substrate and the transfer of the hydrogen to an acceptor in an oxidation-reduction reaction.