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BETA Wikiled
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Translation English - Russian : a

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Noun
  1. the blood group whose red cells carry the A antigen
  2. the 1st letter of the Roman alphabet
  3. the basic unit of electric current adopted under the Systeme International d'Unites
  4. a metric unit of length equal to one ten billionth of a meter (or 0.0001 micron); used to specify wavelengths of electromagnetic radiation
  5. (biochemistry) purine base found in DNA and RNA; pairs with thymine in DNA and with uracil in RNA
  6. one of the four nucleotides used in building DNA; all four nucleotides have a common phosphate group and a sugar (ribose)
  7. any of several fat-soluble vitamins essential for normal vision; prevents night blindness or inflammation or dryness of the eyes

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