the primary urine or blood sample used in doping tests in professional sports; if the A-sample tests positive, the B-sample is tested to confirm or invalidate the results See also B-sample
noun the side of a gramophone record regarded as the more important one Historical Examples And yf e addicioun sholde be made to a cifre, sette it a-side, and write in his place .5. The Earliest Arithmetics in English Anonymous
- A star
a blue to white star, as Altair, Sirius, or Vega, having a surface temperature between 7500 and 10,000 K and an absorption spectrum dominated by Balmer-series lines of hydrogen.
a-strabismus A-strabismus n. Strabismus in which esotropia is more marked in looking upward than downward. Strabismus in which exotropia is more marked on looking downward than upward.
- A supply
a battery or other source of power for heating the filament or cathode heater of an electron tube.