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

  • adjective Of or relating to a molecule or ion that has two or more atoms as constituents.

from The Century Dictionary.

  • In chem., noting elements or radicals which have an equivalency greater than two; also, noting compounds having three or more hydroxyl groups, in which hydrogen is easily replaceable by other elements or radieals without otherwise changing the structure of the original compound: thus, glycerol is a polyatomic alcohol.

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

  • adjective obsolete, obsolete Having more than one atom in the molecule; consisting of several atoms.
  • adjective obsolete Having a valence greater than one.

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

  • adjective chemistry (of a molecule or ion) consisting of three or more atoms

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adjective of or relating to a molecule made up of more than two atoms


Sorry, no etymologies found.


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