n (Elements & Compounds) an amorphous white insoluble powder. Formula: Tb2O3. Also called: terbia
terbium oxide
terbium oxide
[′tər·bē·əm ′äk‚sīd] (inorganic chemistry) Tb2O3 A slightly hygroscopic, dark-brown powder soluble in dilute acids, absorbs carbon dioxide from air. Also known as terbia.