A

[ US /ˈeɪ, ə/ ]
NOUN
  1. a metric unit of length equal to one ten billionth of a meter (or 0.0001 micron); used to specify wavelengths of electromagnetic radiation
  2. the 1st letter of the Roman alphabet
  3. the blood group whose red cells carry the A antigen
  4. (biochemistry) purine base found in DNA and RNA; pairs with thymine in DNA and with uracil in RNA
  5. one of the four nucleotides used in building DNA; all four nucleotides have a common phosphate group and a sugar (ribose)
  6. any of several fat-soluble vitamins essential for normal vision; prevents night blindness or inflammation or dryness of the eyes
  7. the basic unit of electric current adopted under the Systeme International d'Unites
    a typical household circuit carries 15 to 50 amps
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How To Use A In A Sentence

  • I bought a dozen eggs and every one of them was bad.
  • The Staff of Volans has a limited supply of magic energy. Roll a dice after each spell is cast.
  • Liberal democracy is a fraud, a cover for the power of the elite. Times, Sunday Times
  • There were 42 free-kicks, two penalties, four bookings and three players sent off, two of whom had to be escorted from the pitch by police.
  • This came out of an investigation he was carrying out into when a ternary quartic form could be represented as the sum of five fourth powers of linear forms.
  • The ball rebounded from/off the wall into the pond.
  • He described the sequence of events leading up to the robbery.
  • Season with a pinch of salt and pepper. The Sun
  • The difficulties of the next year or two will, no doubt, reawaken the pro-euro lobby.
  • I can't find any relevant material on him in the library.
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