Definify.com
Webster 1913 Edition
Triatomic
Triˊa-tom′ic
,Adj.
[Pref.
tri-
+ atomic
.] (Chem.)
(a)
Having three atoms; – said of certain elements or radicals.
(b)
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