uranium

(ū-rā′nē-ŭm )

To hear audio pronunciation of this topic, purchase a subscription or log in.

[ Uranus (the planet) + -ium (1)]
SYMB: U A radioactive metallic element, the parent of radium and other radioelements, atomic weight, 238.029, atomic number 92. Uranium ore contains the isotopes 238U, 235U, and 234U.

There's more to see -- the rest of this topic is available only to subscribers.