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diatomic

American  
[dahy-uh-tom-ik] / ˌdaɪ əˈtɒm ɪk /

adjective

Chemistry.
  1. having two atoms in the molecule.

  2. containing two replaceable atoms or groups; binary.


diatomic British  
/ ˌdaɪætəˈmɪsɪtɪ, ˌdaɪəˈtɒmɪk /

adjective

    1. containing two atoms

    2. containing two characteristic groups or atoms

      ethylene glycol is a diatomic alcohol

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Derived Forms

Etymology

Origin of diatomic

First recorded in 1865–70; di- 1 + atomic

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