unnilseptium

American  

[yoo-nil-sep-tee-uhm] / ˌyu nɪlˈsɛp ti əm /

noun

Chemistry, Physics.

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

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Etymology

Origin of unnilseptium

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