a

phonetic symbol: / ə | éɪ / 

a - English Dictionary

[ noun ]
■ the blood group whose red cells carry the A antigen
group a , type a

[ noun ]
■ the 1st letter of the Roman alphabet

[ noun ]
■ the basic unit of electric current adopted under the Systeme International d'Unites
e.g.)
・a typical household circuit carries 15 to 50 amps
amp , ampere

[ 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
angstrom , angstrom unit

[ noun ]
■ (biochemistry) purine base found in DNA and RNA
■ pairs with thymine in DNA and with uracil in RNA
adenine

[ noun ]
■ one of the four nucleotides used in building DNA
■ all four nucleotides have a common phosphate group and a sugar (ribose)
deoxyadenosine monophosphate

[ noun ]
■ any of several fat-soluble vitamins essential for normal vision
■ prevents night blindness or inflammation or dryness of the eyes
antiophthalmic factor , axerophthol , vitamin a

Word list en

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