A, n.
more info the blood group whose red cells carry the A antigen

A group A type A
semantic pointers
more info the 1st letter of the Roman alphabet

A a
more info the basic unit of electric current adopted under the Systeme International d'Unites
<noun.quantity>   freq. cnt.: 4 freq. cnt.: 4

A amp ampere

sample sentences

"a typical household circuit carries 15 to 50 amps"
semantic pointers
part holonym
part meronym
more info a metric unit of length equal to one ten billionth of a meter (or 0.0001 micron); used to specify wavelengths of electromagnetic radiation

A angstrom angstrom unit
more info (biochemistry) purine base found in DNA and RNA; pairs with thymine in DNA and with uracil in RNA

A adenine
semantic pointers
domain of synset (topic)
substance holonym
more info one of the four nucleotides used in building DNA; all four nucleotides have a common phosphate group and a sugar (ribose)

A deoxyadenosine monophosphate
semantic pointers
more info any of several fat-soluble vitamins essential for normal vision; prevents night blindness or inflammation or dryness of the eyes

A antiophthalmic factor axerophthol vitamin A