1. ex-serviceman a person who has served in the armed forces
  2. axis of rotation the center around which something rotates
  3. ecosystem organisms interacting with their physical environment
  4. excessive beyond normal limits
  5. excessively to a degree exceeding normal or proper limits
  6. access time (computer science) the interval between the time data is requested by the system and the time the data is provided by the drive
  7. exclusive right a right reserved exclusively by a particular person or group
  8. exoskeleton the exterior protective or supporting structure or shell of many animals (especially invertebrates) including bony or horny parts such as nails or scales or hoofs
  9. excessiveness immoderation as a consequence of going beyond sufficient or permitted limits
  10. exciseman someone who collects taxes for the government
  11. water-soluble vitamin any vitamin that is soluble in water
  12. executive session a session that is closed to the public
  13. expressive aphasia aphasia in which expression by speech or writing is severely impaired
  14. exhaust fan a fan that moves air out of an enclosure
  15. exacerbate make worse
  16. excise tax a fee measured by the amount of business done
  17. expressive style a way of expressing something (in language or art or music etc.) that is characteristic of a particular person or group of people or period
  18. exasperation actions that cause great irritation
  19. fat-soluble vitamin any vitamin that is soluble in fats
  20. accessibility the quality of being at hand when needed