[ US /ˈeɪ, ə/ ]
- a metric unit of length equal to one ten billionth of a meter (or 0.0001 micron); used to specify wavelengths of electromagnetic radiation
- the 1st letter of the Roman alphabet
- the blood group whose red cells carry the A antigen
- (biochemistry) purine base found in DNA and RNA; pairs with thymine in DNA and with uracil in RNA
- one of the four nucleotides used in building DNA; all four nucleotides have a common phosphate group and a sugar (ribose)
- any of several fat-soluble vitamins essential for normal vision; prevents night blindness or inflammation or dryness of the eyes
the basic unit of electric current adopted under the Systeme International d'Unites
a typical household circuit carries 15 to 50 amps
How To Use A In A Sentence
- I bought a dozen eggs and every one of them was bad.
- The Staff of Volans has a limited supply of magic energy. Roll a dice after each spell is cast.
- Liberal democracy is a fraud, a cover for the power of the elite. Times, Sunday Times
- There were 42 free-kicks, two penalties, four bookings and three players sent off, two of whom had to be escorted from the pitch by police.
- This came out of an investigation he was carrying out into when a ternary quartic form could be represented as the sum of five fourth powers of linear forms.
- The ball rebounded from/off the wall into the pond.
- He described the sequence of events leading up to the robbery.
- Season with a pinch of salt and pepper. The Sun
- The difficulties of the next year or two will, no doubt, reawaken the pro-euro lobby.
- I can't find any relevant material on him in the library.