a

What does a mean?

• noun

  one of the four nucleotides used in building DNA; all four nucleotides have a common phosphate group and a sugar (ribose)

• noun

  the blood group whose red cells carry the A antigen

• noun

  any of several fat-soluble vitamins essential for normal vision; prevents night blindness or inflammation or dryness of the eyes

• noun

  the basic unit of electric current adopted under the Systeme International d'Unites

• noun

  a metric unit of length equal to one ten billionth of a meter (or 0.0001 micron); used to specify wavelengths of electromagnetic radiation

• noun

  (biochemistry) purine base found in DNA and RNA; pairs with thymine in DNA and with uracil in RNA

• noun

  the 1st letter of the Roman alphabet

Anagrams of a