имя существительное [химия] водород
водород
водород, H
noun Etymology: French hydrogène, from hydr- + -gène -gen; from the fact that water is generated by its combustion a nonmetallic element that is the simplest and lightest of the elements, is normally a colorless odorless highly flammable diatomic gas, and is used especially in synthesis — see element table; compare deuterium, tritium • hydrogenous adjective