Zach' crossword

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Across
  1. 3. a one-wheeled vehicle
  2. 4. of or pertaining to two languages using two languages
  3. 8. a three-legged stnd or support
  4. 9. taking place twice a year
  5. 12. lasting for consisting of or taking place every two hundred years
  6. 14. lasting for two years
  7. 16. being three-sided
  8. 18. is an animal written about in fables pictured as having a single horn in the middle of its forehead
  9. 19. a two-footed animal
Down
  1. 1. is a one-legged support
  2. 2. the number named by a unit with nine zeros after it 1,000,000,000
  3. 5. of or pertaining to one language using one language
  4. 6. the number named by a unit with twelve zeros after it 1,000,000,000,000
  5. 7. of or pertaining to three languages using three languages
  6. 10. to cut or divide something into two parts
  7. 11. being one-sided
  8. 13. a two- winged airplane
  9. 15. plane geometric figures of three sides and three angles
  10. 17. to make one or cause to become one