from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Of, relating to, or containing phosphorus, especially with valence 3 or a valence lower than that of a comparable phosphoric compound.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Of or pertaining to phosphorus.
  • adj. Resembling phosphorus.
  • adj. Of relating to or containing trivalent phosphorus.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Of or pertaining to phosphorus; resembling or containing phosphorus; specifically, designating those compounds in which phosphorus has a lower valence as contrasted with phosphoric compounds.

from The Century Dictionary and Cyclopedia

  • Pertaining to, obtained from, or containing phosphorus.

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

  • adj. containing or characteristic of phosphorus


From phosphorus +‎ -ous. (Wiktionary)



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