Unit 1 Word Cell

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Across
  1. 4. lasting for two years
  2. 5. a two-footed animal
  3. 7. two; twice
  4. 8. a three-legged stand or support
  5. 11. taking place twice a year
  6. 13. the number named by a unit with twelve zeros after it; 1000 billions; 1,000,000,000,000
  7. 15. a plane geometric figure of three sides and three angles
  8. 16. a one-wheeled vehicle
  9. 17. of or pertaining to one language; using one language
  10. 18. being one-sided
  11. 19. to make one, or cause to become one
Down
  1. 1. lasting for, consisting of, or taking place every 200 years
  2. 2. being three-sided
  3. 3. a one-legged support
  4. 5. the number named by a unit with nine zeros after it; 1000 millions; 1,000,000,000
  5. 6. of or pertaining to three languages; using three languages
  6. 9. a two-winged airplane
  7. 10. one; single
  8. 11. of or pertaining to two languages; using two languages
  9. 12. to cut or divide something into two parts; in geometry, into two equal parts
  10. 14. an animal written about in fables
  11. 15. three; three times