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3 definitions found

From: DICT.TW English-Chinese Dictionary 英漢字典

 poly·atom·ic /-əˈtɑmɪk/
 (a.)多原子的

From: Webster's Revised Unabridged Dictionary (1913)

 Pol·y·a·tom·ic a.  Chem. (a) Having more than one atom in the molecule; consisting of several atoms. (b) Having a valence greater than one. [Obs.]
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From: WordNet (r) 2.0

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