What did the crusaders bring back?

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Across
  1. 3. a floor covering made from woven fabric
  2. 4. a juicy, soft fruit, resembling a small peach, of an orange-yellow color
  3. 6. the watering of land to make it ready for agriculture
  4. 8. a strategic board game played with two players on a checkered board
  5. 9. a large wheel driven by flowing water, used to work machinery or to raise water to a higher level
  6. 12. the form of numerals of which we use today (0-9)
  7. 15. the part of mathematics in which letters and other general symbols are used to represent numbers and quantities in formulae and equations
  8. 16. a swamp grass that is widely cultivated as a source of food, especially in Asia
  9. 17. a clock that used the flow of water to measure time
  10. 19. the large round fruit of a plant of the gourd family, with sweet pulpy flesh and many seeds
  11. 20. a yellow, oval citrus fruit with thick skin and fragrant, acidic juice
Down
  1. 1. a surface that reflects a clear image
  2. 2. a drug made to relieve pain
  3. 5. an aromatic or pungent vegetable substance used to flavor food, e.g., cloves, pepper, or mace
  4. 7. a reddish fruit usually used in pies along with strawberries
  5. 8. the branch of science that deals with the identification of the substances of which matter is composed
  6. 9. a small cart with a single wheel at the front and two supporting legs and two handles at the rear
  7. 10. a frozen desert which is made by mixing milk or cream with a fruit juice
  8. 11. a fabric case filled with deformable or resilient material, used for sleeping on
  9. 13. a beverage which contains high amounts of caffeine and is usually consumed while hot
  10. 14. a simple carbohydrate which is commonly used in sweet foods
  11. 18. a piece of fabric worn by women over the shoulders or head or wrapped around a baby