hydrogen, n.
(hydrogens)
freq. cnt. 6
(hydrogens)
freq. cnt. 6
a nonmetallic univalent element that is normally a colorless and odorless highly flammable diatomic gas; the simplest and lightest and most abundant element in the universe
<noun.substance> freq. cnt.: 6 freq. cnt.: 6
H atomic number 1 hydrogen
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