Meaning of U

Definition of U

(adj) (chiefly British) of or appropriate to the upper classes especially in language use
(noun) a base containing nitrogen that is found in RNA (but not in DNA) and derived from pyrimidine; pairs with adenine
a heavy toxic silvery-white radioactive metallic element; occurs in many isotopes; used for nuclear fuels and nuclear weapons
the 21st letter of the Roman alphabet

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