Definition of monatomic in English:

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Pronunciation: /ˌmänəˈtämik/
(also monoatomic /ˌmonōəˈtämik/)


Consisting of one atom.
Example sentences
  • Although the most common anion formed by oxygen is monatomic, oxygen can also form diatomic ions known as peroxides and superoxides (monovalent).
  • For example, aluminum, helium, and sodium are monatomic elements, or elements whose atoms can exist alone, without forming molecules.
  • Data for monatomic gases like argon and helium give exact agreement, and many diatomic gases show experimental results in close accord with the theory.

For editors and proofreaders

Syllabification: mon·a·tom·ic

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