tools and articles for letters and words

a

Letters of A

consonants
vowelsa
alphagrama

Thesaurus

Another word for A

a: angstrom unit, antiophthalmic factor, deoxyadenosine monophosphate, group A, type A, vitamin A, amp, ampere, angstrom, axerophthol

Meaning of A

[n] the 1st letter of the Roman alphabet

[n] the blood group whose red cells carry the A antigen

[n] the basic unit of electric current adopted under the System International d'Unites; "a typical household circuit carries 15 to 50 amps"

[n] a metric unit of length equal to one ten billionth of a meter (or 0.0001 micron); used to specify wavelengths of electromagnetic radiation

[n] one of the four nucleotides used in building DNA; all four nucleotides have a common phosphate group and a sugar (ribose)

[n] any of several fat-soluble vitamins essential for normal vision; prevents night blindness or inflammation or dryness of the eyes

See also

a: Roman alphabet, alphabetic character, blood group, blood type, current unit, fat-soluble vitamin, letter of the alphabet, metric linear unit, vitamin A1, vitamin A2, abamp, abampere, dehydroretinol, letter, mA, micromicron, micromillimeter, micromillimetre, milliampere, millimicron, nanometer, nanometre, nm, nucleotide, picometer, picometre, retinol