ˌmendəlˈyā(y)əˌvīt, -dəˈlā- noun
( -s )
Etymology: Dmitri I. Mendeleev ( Mendelyeev ) died 1907 Russ. chemist + English -ite
: a calcium urano-titano-niobate occurring in black isometric crystals and masses and being essentially a titanian and rare-earth-bearing betafite