copernicium

[ koh-per-nis-ee-uh m ]
/ ˌkoʊ pərˈnɪs i əm /

noun Chemistry, Physics.

a superheavy, synthetic, radioactive element with a very short half-life. Symbol: Cn; atomic number: 112.
Formerly unubium, element 112.

Origin of copernicium

named after Polish astronomer Nicolaus Copernicus; see -ium