(chemistry) Of an element, consisting of a single atom in the molecule, for example, the noble gases. Note: Strictly speaking, a molecule has at least two atoms.
Consisting of, or containing, one atom; as, the molecule of mercury is monatomic.
Having a valence of one; univalent. See Univalent.
of or relating to an element consisting of a single atom;
‘helium and argon are monatomic gases’;
containing only one kind of antibody
having a valence of 1