Prefix Bi-

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Across
  1. 3. (n) a vehicle with two wheels
  2. 4. (n) eyeglasses with lenses that have two different sections - for seeing close up and far awar
  3. 6. (adj) happening every two months
  4. 7. (adj) happening every two weeks
  5. 8. (adj) able to speak two different languages
  6. 10. (n) a two-footed creature
  7. 11. (adj) made up of only two parts. In mathematics this is a number system that only uses two digits, 1 and 0
Down
  1. 1. (n) a two-pointed tooth located in the side of the jaw
  2. 2. (n) an instrument that you look through with both eyes to make distant things seem closer
  3. 3. (n) an airplane with two pairs of wings
  4. 5. (adj) happening every two years
  5. 9. (adj) having two different colors