1) Containing trivalent uranium 2) Of a radioactive element 3) Uranium compound 
For other meanings, see Uranus (disambiguation). Uranous is the chemical term for the reduced tetrapositive cation of uranium that exhibits the valence U4+. It is one of the two common ionic states of uranium found in nature, the other being the oxidised hexapositive ion called uranyl. Uranous compounds are usually unstable; they revert to the oxi...
• (a.) Pertaining to, or containing, uranium; designating those compounds in which uranium has a lower valence as contrasted with the uranic compounds.
containing trivalent uranium.