Hypertext Webster Gateway: "monatomic"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Monatomic \Mon`a*tom"ic\, adv. [Mon- + atomic.] (Chem.)
(a) Consisting of, or containing, one atom; as, the molecule
of mercury is monatomic.
(b) Having the equivalence or replacing power of an atom of
hydrogen; univalent; as, the methyl radical is monatomic.
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