1. required course a course that all students are required to take
  2. requirement necessary activity
  3. required necessary by rule
  4. track record the sum of recognized accomplishments
  5. retrograde moving or directed or tending in a backward direction
  6. deck of cards a pack of 52 playing cards
  7. regurgitate pour or rush back
  8. arteria carotis either of two major arteries of the neck and head
  9. regrets a polite refusal of an invitation
  10. Rider Haggard British writer noted for romantic adventure novels
  11. rearguard a detachment assigned to protect the rear of a military body
  12. regard as look on as or consider
  13. Richards English literary critic who collaborated with C. K. Ogden and contributed to the development of Basic English (1893-1979)
  14. Heinrich Hertz German physicist who was the first to produce electromagnetic waves artificially (1857-1894)
  15. mercuric chloride a white poisonous soluble crystalline sublimate of mercury
  16. I. A. Richards English literary critic who collaborated with C. K. Ogden and contributed to the development of Basic English (1893-1979)
  17. pack of cards a pack of 52 playing cards
  18. Akira Kurosawa Japanese filmmaker noted for blending Japanese folklore with western styles of acting (1910-1998)
  19. recrudesce happen
  20. peach orchard a grove of peach trees

Sign up, it's free!

Whether you're a student, an educator, or a lifelong learner, Vocabulary.com can put you on the path to systematic vocabulary improvement.