Synonyms of "A"
noun - a metric unit of length equal to one ten billionth of a meter (or 0.0001 micron)
noun - any of several fat-soluble vitamins essential for normal vision
noun - one of the four nucleotides used in building DNA
noun - (biochemistry) purine base found in DNA and RNA
noun - the basic unit of electric current adopted under the Systeme International d'Unites
noun - the blood group whose red cells carry the A antigen