1. excellent very good; of the highest quality
  2. excellence possessing good qualities in high degree
  3. excellently extremely well
  4. user interface (computer science) a program that controls a display for the user (usually on a computer monitor) and that allows the user to interact with the system
  5. Excellency a title used to address dignitaries
  6. acyl anhydrides organic compounds that react with water to form an acid
  7. excellency an outstanding feature
  8. exculpatory clearing of guilt or blame
  9. exclamatory expressed suddenly and with force
  10. axillary fossa the hollow under the arm where it is joined to the shoulder
  11. axillary vein a continuation of the basilic vein and brachial vein that becomes the subclavian vein
  12. axletree a dead axle on a carriage or wagon that has terminal spindles on which the wheels revolve
  13. exclusive admitting or accepting only a particular group
  14. Inland Revenue a board of the British government that administers and collects major direct taxes
  15. accelerative tending to increase velocity
  16. slenderness relatively small dimension through an object as opposed to its length or width
  17. Iceland moss lichen with branched flattened partly erect thallus that grows in mountainous and Arctic regions; used as a medicine or food for humans and livestock; a source of glycerol
  18. ex libris a label identifying the owner of a book in which it is pasted
  19. axle grease a thick heavy grease used to lubricate axles
  20. explanatory serving or intended to make clear