monatomic

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mon·a·tom·ic

 (mŏn′ə-tŏm′ĭk)
adj.
Occurring as single atoms: Helium is a monatomic gas.

mon′a·tom′ic·al·ly adv.

monatomic

(ˌmɒnəˈtɒmɪk) or

monoatomic

adj
1. (Chemistry) (of an element) having or consisting of single atoms: argon is a monatomic gas.
2. (Chemistry) (of a compound or molecule) having only one atom or group that can be replaced in a chemical reaction
3. (Chemistry) a less common word for monovalent

mon•a•tom•ic

(ˌmɒn əˈtɒm ɪk)

adj.
1. having one atom in the molecule.
2. containing one replaceable atom or group.
3. having a valence of one.
[1840–50]
mon`a•tom′i•cal•ly, adv.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.monatomic - of or relating to an element consisting of a single atommonatomic - of or relating to an element consisting of a single atom; "helium and argon are monatomic gases"
References in periodicals archive ?
Mandatory informational meeting will be held on Tuesday July 1, 2014 at 10:00 AM CT at the M-State, 1990 28th Ave.
In the simulation, the satellite channel is modeled as an M-state Markov channel which simulates the Rician fading of the received signal envelope.
States will pass many peculiar laws that claim to "involve" alcohol, and use that authority to favor m-state businesses.