A very hard, heavy, silver-colored, radioactive, metallic chemical element, one of the actinides, found only in combination, chiefly in pitchblende: symbol, U; at. no. 92: an isotope (uranium-235) undergoes neutron-induced fission and another, more plentiful, isotope (uranium-238) is used to produce plutonium
U is the 21st letter of the alphabet.
a heavy toxic silvery-white radioactive metallic element; occurs in many isotopes; used for nuclear fuels and nuclear weapons
Find another word for u. In this page you can discover 13 synonyms, antonyms, idiomatic expressions, and related words for u, like: uranium, u, urself, internal-energy, atomic number 92, uracil, ya, yaz, ur, 4get and plz.