boric oxide(redirected from Boron trioxide)
Also found in: Wikipedia.
boric oxide[¦bȯr·ik ′äk‚sīd]
B2O3 A trioxide of boron obtained as rhombic crystals melting at 460°C; used as an intermediate in the production of boron halides and metallic borides and as a thermal neutron absorber in nuclear engineering. Also known as boron oxide.