1. trivial (informal) small and of little importance
  2. quadrivium (Middle Ages) a higher division of the curriculum in a medieval university involving arithmetic and music and geometry and astronomy
  3. quadrille a square dance of 5 or more figures for 4 or more couples
  4. outrival be more of a rival than
  5. drivel saliva spilling from the mouth
  6. quadruple having four units or components
  7. quadrupedal having four feet
  8. quadraphony a stereophonic sound recording or reproducing system using four separate channels
  9. retrieval the act of regaining or saving something lost
  10. Geum rivale erect perennial of north temperate zone having pinnate leaves and a few nodding flowers with a brown-purple calyx and orange and pink petals
  11. quadriplegia paralysis of both arms and both legs
  12. trivially in a frivolously trivial manner
  13. convivial occupied with or fond of the pleasures of good company
  14. quadrillion the number that is represented as a one followed by 15 zeros
  15. quadrangle a four-sided polygon
  16. quadrilateral a four-sided polygon
  17. quadratic of or relating to the second power
  18. Triavil tranquilizer and antidepressant (trade name Triavil) sometimes used as an antiemetic for adults
  19. madrigal an unaccompanied partsong for several voices
  20. quadruplet one of four children born at the same time from the same pregnancy

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