uranium trioxide(redirected from Uo3)
Also found in: Dictionary, Acronyms.
uranium trioxide[yə′rā·nē·əm trī′äk‚sīd]
UO3 A poisonous, radioactive, red to yellow powder; soluble in nitric acid, insoluble in water; decomposes when heated; used in ceramics and pigments and for uranium refining. Also known as orange oxide; uranium oxide.