Synonym: H, atomic number 1. Similar words: hydrogen bomb, chondrogenesis, hydrosphere, hydrometer, hydrophobia, hydrodynamic, progeny, nitrogen. Meaning: ['haɪdrədʒən] 
n. 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.
n. 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. 
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181. If the hydrogen is ignited it is likely to explode.
182. These great clouds of cold hydrogen resemble summer afternoon thunderheads.
183. A chemist can analyze water into two colorless gases, hydrogen and oxygen.
184. Water is a compound containing the elements hydrogen and oxygen.
185. We now incorporate this condition into the analysis of the hydrogen atom.
More similar words: hydrogen bomb, chondrogenesis, hydrosphere, hydrometer, hydrophobia, hydrodynamic, progeny, nitrogen, nitrogen fixation, hydrate, hydrant, dehydrate, dehydration, carbohydrate, cogent, cogency, pathogen, photogenic, homogeneity, homogenized, homogeneous, hallucinogen, carcinogenic, intelligence agency, pachyderm, together, apogee, go together, altogether, get together.