How to say a ?

A

[eÉŠ]

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What is the definition of a ?

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

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