uranium

uranium

CEFR: C1-C2 /ura-ni-um/ [y.er0.ey1.n.iy0.ah0.m]

Definition: The chemical element of atomic number 92, a gray, dense radioactive metal used as a fuel in nuclear reactors. (Symbol: U)

Example Sentences:
It is not certain if the effects are due to the chemical or the radioactive properties of uranium.