ununseptium
[ uhn-uh n-sep-tee-uh m ]
/ ˌʌn ənˈsɛp ti əm /
noun Chemistry, Physics.
a superheavy, synthetic, radioactive element with a short half-life. Symbol: Uus; atomic number: 117.
Also called
element 117.
Words nearby ununseptium
ununhexium,
ununnilium,
ununoctium,
ununpentium,
ununquadium,
ununseptium,
ununtrium,
unununium,
unusable,
unused,
unusual