"uni" and "bi"

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Across
  1. 3. (n) a one-piece leotard and tights combination
  2. 4. (adj.) having only one cell
  3. 6. (n) an airplane with two pairs of wings
  4. 7. (adj.) one of a kind; unusual or rae
  5. 9. (n) a two-pointed tooth located in the side of the jaw
  6. 11. (adj) able to speak two languages
  7. 14. (adj) happening every two weeks
Down
  1. 1. (n) a two-footed creature
  2. 2. (n) eyeglasses with lenses that have two different sections
  3. 3. (v) to join together into one group
  4. 4. (adj.) moving in only one direction
  5. 5. (adj.) one sided
  6. 7. (n) a one-wheeled vehicle
  7. 8. (n) one group
  8. 9. (n) a vehicle with two wheels
  9. 10. (n) a group that sounds like one
  10. 11. (adj) happening every two years
  11. 12. (n) a horse-like fabled animal with one horn
  12. 13. (adj.) having two different colors