Search Result for "polyatomic": 
Wordnet 3.0

ADJECTIVE (1)

1. of or relating to a molecule made up of more than two atoms; 



The Collaborative International Dictionary of English v.0.48:

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]


WordNet (r) 3.0 (2006):

polyatomic
    adj 1: of or relating to a molecule made up of more than two
           atoms