1. about turn act of pivoting 180 degrees, especially in a military formation
  2. upturn an upward movement or trend as in business activity
  3. outturn what is produced in a given time period
  4. aptitude inherent ability
  5. boat train a train taking passengers to or from a port
  6. betatron accelerates a continuous beam of electrons to high speeds by means of the electric field produced by changing magnetic flux
  7. taciturn habitually reserved and uncommunicative
  8. apathetic showing little or no emotion or animation
  9. overturn cause to flip from an upright or normal position
  10. abductor a muscle that draws a body part away from the median line
  11. ampere-turn a unit of magnetomotive force equal to the magnetomotive force produced by the passage of 1 ampere through 1 complete turn of a coil; equal to 1.257 gilberts
  12. auburn (of hair) colored a moderate reddish-brown
  13. acetate rayon a fabric made from fibers of cellulose acetate
  14. obdurate stubbornly persistent in wrongdoing
  15. abound in exist in large quantity
  16. amputator a surgeon who removes part or all of a limb
  17. good turn a favor for someone
  18. joint return a return filed by a husband and wife
  19. adjourn close at the end of a session
  20. u-turn complete reversal of direction of travel