unnilseptium

[ yoo-nil-sep-tee-uhm ]

noun

, Chemistry, Physics.

1. the systematic element name for element 107 before being named bohrium. : Uns

Word History and Origins

Origin of unnilseptium¹

First recorded in 1975–80; from Latin ūn(us) “one” + nil ( def ) “zero” + sept(em) “seven” + -ium ( def )