beryllian.

/bəˈrɪlɪə/Etymology: < beryllium n.; compare magnesia, magnesium.
Chemistry.
the world > matter > chemistry > elements and compounds > metals > specific elements > beryllium > [noun] > compounds
1868 H. B. Jones & H. Watts (ed. 10) 381 An ignited mixture of beryllia and charcoal.
This entry has not yet been fully updated (first published 1887; most recently modified version published online March 2021).