A - definition, pronunciation, transcription

*
Amer.  |eɪ|  American pronunciation of the word a
Brit.  |eɪ|  British pronunciation of the word 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
- any of several fat-soluble vitamins essential for normal vision; prevents night blindness or inflammation or dryness of the eyes
- one of the four nucleotides used in building DNA; all four nucleotides have a common phosphate group and a sugar (ribose)
- (biochemistry) purine base found in DNA and RNA; pairs with thymine in DNA and with uracil in RNA
- the basic unit of electric current adopted under the Systeme International d'Unites (syn: amp, ampere)
a typical household circuit carries 15 to 50 amps
- the 1st letter of the Roman alphabet
- the blood group whose red cells carry the A antigen

Extra examples

A word that begins with an a

A word that begins with a

A song in the key of A

She got an A on the exam.

If I'd known there was a luncheon party on I woulda stayed home.

Milk is delivered twice a day.

Murmansk is a port in the North

Word forms

noun
singular: a
plural: a's
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