triatomic

listen to the pronunciation of triatomic
Английский Язык - Турецкий язык
(Tıp) a) Üç atomlu. b) Üç hidrojen atomlu. c) Üç hidroksil gruplu
Английский Язык - Английский Язык
consisting of three atoms

Ozone is a triatomic form of oxygen.

Having three atoms; said of certain elements or radicals
{s} containing three atoms (Chemistry)
Having a valence of three; trivalent; sometimes, in a specific sense, having three hydroxyl groups, whether acid or basic; thus, glycerin, glyceric acid, and tartronic acid are each triatomic