H3PO3

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Phosphorous \Phos"phor*ous\ (f[o^]s"f[o^]r*[u^]s), a. [Cf. F.
     phosphoreux.] (Chem.)
     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; as, phosphorous acid, {H3PO3}.


     [1913 Webster]