a

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 (synset 113679721)
  • Any of several fat-soluble vitamins essential for normal vision
    Prevents night blindness or inflammation or dryness of the eyes (synset 115114370)
  • One of the four nucleotides used in building DNA
    All four nucleotides have a common phosphate group and a sugar (ribose) (synset 114853735)
  • (biochemistry) purine base found in DNA and RNA
    Pairs with thymine in DNA and with uracil in RNA (synset 114731050)
  • The basic unit of electric current adopted under the Systeme International d'Unites (synset 113658855)
  • The 1st letter of the Roman alphabet (synset 106844227)
  • The blood group whose red cells carry the A antigen (synset 105408203)

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