polyatomic

[ pol-ee-uh-tom-ik ]
/ ˌpɒl i əˈtɒm ɪk /

adjective Chemistry.

pertaining to a molecule containing more than two atoms.

Origin of polyatomic

First recorded in 1855–60; poly- + atomic

Words nearby polyatomic

polyarteritis nodosa, polyarthric, polyarthritis, polyarthritis rheumatica acuta, polyarticular, polyatomic, polyaxial joint, polybasic, polybasic acid, polybasite, polybius

British Dictionary definitions for polyatomic

polyatomic
/ (ˌpɒlɪəˈtɒmɪk) /

adjective

(of a molecule) containing more than two atoms