Latin Number Roots

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Across
  1. 2. a support with three legs for a camera
  2. 3. the same; not changing or different in any way
  3. 4. able to use two languages equally well
  4. 6. made of only one cell
  5. 7. a place where people study for an undergraduate or postgraduate degree
  6. 8. a flat shape with four straight sides
  7. 10. all physical matter
  8. 11. an Olympic sport that includes five events
  9. 14. to divide something in two
  10. 15. a three-month period
  11. 17. a shape with five sides and five angles
  12. 18. to bring together; combine
Down
  1. 1. lenses divided into two parts
  2. 5. an imaginary creature with a single horn
  3. 6. being the only existing one of its type
  4. 9. one of three children born to the same mother at the same time
  5. 12. a weapon consisting of a pole with three sharp metal points
  6. 13. the playing or singing at the same pitch
  7. 15. a group of three people or things
  8. 16. a series of three books, plays, etc.