A
Explore definitions, synonyms, and language insights of A
Definitions
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
any of several fat-soluble vitamins essential for normal vision; prevents night blindness or inflammation or dryness of the eyes
Noun
one of the four nucleotides used in building DNA; all four nucleotides have a common phosphate group and a sugar (ribose)
Noun
(biochemistry) purine base found in DNA and RNA; pairs with thymine in DNA and with uracil in RNA
Noun
the basic unit of electric current adopted under the Systeme International d''Unites; "a typical household circuit carries 15 to 50 amps"
Noun
the 1st letter of the Roman alphabet
Noun
the 1st letter of the Roman alphabet
Noun
the blood group whose red cells carry the A antigen
Synonyms
a
adenine
amp
ampere
angstrom
angstrom unit
antiophthalmic factor
axerophthol
deoxyadenosine monophosphate
group A
type A
vitamin A