Dictionary

hydrogen

noun hy·dro·gen \ˈhī-drə-jən, -dər-\

: a chemical element that has no color or smell and that is the simplest, lightest, and most common element

Full Definition of HYDROGEN

:  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
hy·drog·e·nous \hī-ˈdrä-jə-nəs\ adjective

Origin of HYDROGEN

French hydrogène, from hydr- + -gène -gen; from the fact that water is generated by its combustion
First Known Use: 1788

hydrogen

noun hy·dro·gen \ˈhī-drə-jən\   (Medical Dictionary)

Medical Definition of HYDROGEN

:  a nonmetallic element that is the simplest and lightest of the elements and that is normally a colorless odorless highly flammable diatomic gas—symbol H; see deuterium, tritium; element table
hy·drog·e·nous \hī-ˈdräj-ə-nəs\ adjective
May 25, 2015
callithump Hear it
a noisy boisterous band or parade
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