Isotopes of uranium Reference Libraries
Uranium is a chemical element in the periodic table that has the symbol U and atomic number 92. A heavy, silvery-white, toxic, metallic, and naturally-radioactive element, uranium belongs to the actinide series and its isotope 235U is used as the fuel for nuclear reactors and nuclear weapons. Uranium is commonly found in very small amounts in rocks, soil, water, plants, and animals (including...
- The navel or umbilicus.
- In Greek archaeology: A central boss, as on a shield, a bowl, etc.