1. aerobic exercise exercise that increases the need for oxygen
  2. arm exercise exercise designed to strengthen the arm muscles
  3. anaerobic exercise exercise that builds muscles through tension
  4. exercise the activity of exerting muscles to keep fit
  5. graduation exercise an academic exercise in which diplomas are conferred
  6. isotonic exercise exercise in which opposing muscles contract and there is controlled movement (tension is constant while the lengths of the muscles change)
  7. arteriosclerosis sclerosis of the arterial walls
  8. Artaxerxes king of Persia who sanctioned the practice of Judaism in Jerusalem (?-424 BC)
  9. Orites excelsa Australian tree having alternate simple leaves (when young they are pinnate with prickly toothed margins) and slender axillary spikes of white flowers
  10. exorcise expel through adjuration or prayers
  11. arduous characterized by effort to the point of exhaustion
  12. Artaxerxes II king of Persia who subdued numerous revolutions and made peace with Sparta (?-359 BC)
  13. Artaxerxes I king of Persia who sanctioned the practice of Judaism in Jerusalem (?-424 BC)
  14. isometric exercise muscle-building exercises (or a system of musclebuilding exercises) involving muscular contractions against resistance without movement (the muscles contracts but the length of the muscle does not change)
  15. arduousness extreme effortfulness
  16. Earth's surface the outermost level of the land or sea
  17. Earth's crust the outer layer of the Earth
  18. arteriolosclerosis sclerosis of the arterioles
  19. Carduus crispus European biennial introduced in North America having flower heads in crowded clusters at ends of branches
  20. ordered series an ordered reference standard