1. affective disorder any mental disorder not caused by detectable organic abnormalities of the brain and in which a major disturbance of emotions is predominant
  2. effect a phenomenon that is caused by some previous phenomenon
  3. affect have an influence upon
  4. effectiveness power to be effective
  5. objective the goal intended to be attained
  6. effective producing or capable of producing an intended result
  7. preventive strike a strike that is carried out in order to deter expected aggression by hostile forces
  8. detective story a narrative about someone who investigates crimes and obtains evidence leading to their resolution
  9. selective service compulsory military service
  10. Selective Service an independent federal agency that administers compulsory military service
  11. effectivity power to be effective
  12. elective course a course that the student can select from among alternatives
  13. affected role the semantic role of an entity that is not the agent but is directly involved in or affected by the happening denoted by the verb in the clause
  14. refractive index the ratio of the velocity of light in a vacuum to that in a medium
  15. ischemic stroke the most common kind of stroke
  16. active site the part of an enzyme or antibody where the chemical reaction occurs
  17. perfective tense a tense of verbs used in describing action that has been completed (sometimes regarded as perfective aspect)
  18. activistic advocating or engaged in activism
  19. flight of stairs a stairway between one floor or landing and the next
  20. effectively in a manner producing an intended result

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