1. area code a number usually of 3 digits assigned to a telephone area as in the United States and Canada
  2. Oireachtas the parliament of the Irish Republic
  3. Sarcodes snow plant
  4. archetype something that serves as a model
  5. Archimedes Greek mathematician and physicist noted for his work in hydrostatics and mechanics and geometry (287-212 BC)
  6. Euarctos American black bears
  7. archdiocese the diocese of an archbishop
  8. practise engage in a rehearsal (of)
  9. arcade a structure composed of arches supported by columns
  10. arrogant having or showing feelings of unwarranted importance
  11. Arecaceae chiefly tropical trees and shrubs and vines usually having a tall columnar trunk bearing a crown of very large leaves; coextensive with the order Palmales
  12. rhagades cracks or fissures in the skin
  13. orchitis inflammation of one or both testes
  14. arrogance overbearing pride evidenced by a superior manner
  15. aerides any orchid of the genus Aerides
  16. practice a customary way of operation or behavior
  17. arccos the inverse function of the cosine
  18. archives collection of records especially about an institution
  19. Orchidaceae enormous cosmopolitan family of perennial terrestrial or epiphytic plants with fleshy tubers or rootstocks and unusual flowers
  20. erectness position at right angles to the horizon