Definition of polyatomic in US English:



  • Consisting of many atoms.

    • ‘A polyatomic molecule with bonds which are polar is not necessarily polar itself.’
    • ‘In contrast most other nonmetals tend to form polyatomic molecules in the gaseous state.’
    • ‘The sum of oxidation numbers for all atoms in a polyatomic ion equals the charge on the ion, and the sum of all oxidation numbers for atoms in a neutral molecule equals zero.’
    • ‘The permeability sequence follows the affinity sequence of the binding sites, and larger and polyatomic anions exhibit a higher permeability than other anions.’
    • ‘By removing the free metal ions from solution, the formation of the chloride containing polyatomic ions allows the oxidation reaction to continue toward equilibrium.’