uranium trioxide(redirected from Uranyl oxide)
Also found in: Encyclopedia.
Related to Uranyl oxide: UO2
A poisonous radioactive orange polymorphic solid, UO3, used for uranium refining and as a coloring agent in ceramics.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.