illinium

[ ih-lin-ee-uh m ]
/ ɪˈlɪn i əm /

noun Chemistry. (formerly)

promethium. Symbol: Il

Origin of illinium

1925–30; named after Illinois; see -ium

British Dictionary definitions for illinium

illinium
/ (ɪˈlɪnɪəm) /

noun

chem the former name for promethium

Word Origin for illinium

C20: New Latin, from Illinois + -ium