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Dictionary

  Definition of U
  1. the 21st letter of the Roman alphabet
  2. a heavy toxic silvery-white radioactive metallic element; occurs in many isotopes; used for nuclear fuels and nuclear weapons
  3. a nitrogen-containing base found in RNA (but not in DNA) and derived from pyrimidine; pairs with adenine
  4. (chiefly British) of or appropriate to the upper classes especially in language use
Similar Words: uranium, atomic number 92, uracil, u

 

Hyponyms: uranium 235, uranium 238

 

Substance Meronyms: uraninite, pitchblende, ribonucleic acid, RNA

 

Member Meronyms: Roman alphabet, Latin alphabet

 

 
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