from The American Heritage® Dictionary of the English Language, 5th Edition.

  • adjective Containing three atoms.

from The Century Dictionary.

  • In chem.: Consisting of three atoms: applied to the molecules of elements where the atoms are of the same kind: as, a triatomic element; or to compounds where the atoms are unlike: as, triatomic molecules.
  • Same as trivalent.
  • Having three hydroxyl groups by which other atoms or radicals may be attached without altering the structure of the rest of the molecule: thus, glycerin is called a triatomic alcohol.

from the GNU version of the Collaborative International Dictionary of English.

  • adjective Having three atoms; -- said of certain elements or radicals.
  • adjective Having a valence of three; trivalent; sometimes, in a specific sense, having three hydroxyl groups, whether acid or basic.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • adjective chemistry, of a molecule, etc. Consisting of three atoms.


Sorry, no etymologies found.



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