Meaning of “monatomic” in the English Dictionary

american-english dictionary

"monatomic" in American English

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monatomicadjective [ not gradable ]

/ˈmɑn·əˈtɑm·ɪk/

chemistry having only one atom or group of atoms that can be replaced in a chemical reaction

(Definition of “monatomic” from the Cambridge Academic Content Dictionary © Cambridge University Press)