Polyatomic

2 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Polyatomic \Pol`y*a*tom"ic\, a. [Poly- + atomic.] (Chem.)
     (a) Having more than one atom in the molecule; consisting of
         several atoms.
     (b) Having a valence greater than one. [Obs.]
         [1913 Webster]



From WordNet (r) 2.0 [wn]:

  polyatomic
       adj : of or relating to a molecule made up of more than two atoms