polyatomic

UK:*UK and possibly other pronunciationsUK and possibly other pronunciations/ˌpɒlɪəˈtɒmɪk/US:USA pronunciation: respellingUSA pronunciation: respelling(pol′ē ə tomik)


WordReference Random House Unabridged Dictionary of American English © 2025
pol•y•a•tom•ic  (pol′ē ə tomik),USA pronunciation adj. [Chem.]
  1. Chemistrypertaining to a molecule containing more than two atoms.
  • poly- + atomic 1855–60

Collins Concise English Dictionary © HarperCollins Publishers::
polyatomic / ˌpɒlɪəˈtɒmɪk/
  1. (of a molecule) containing more than two atoms

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