The most abundant isotope of hydrogen, having atomic mass 1. Also called protium.
hydrogen-2 n. See deuterium.
hydrogen-3 n. See tritium.
hydrogenase hy·drog·e·nase (hī-drŏj’ə-nās’, -nāz’) n. An enzyme in certain microorganisms that catalyzes the formation of hydrogen.
[hahy-druh-juh-neyt, hahy-droj-uh-] /ˈhaɪ drə dʒəˌneɪt, haɪˈdrɒdʒ ə-/ verb (used with object), hydrogenated, hydrogenating. 1. to combine or treat with , especially to add to the molecule of (an unsaturated organic compound). /ˈhaɪdrədʒɪˌneɪt; haɪˈdrɒdʒɪˌneɪt/ verb 1. to undergo or cause to undergo a reaction with hydrogen: to hydrogenate ethylene v. 1809, from hydrogen + -ate (2). […]