1. organic brain syndrome mental abnormality resulting from disturbance of the structure or function of the brain
  2. acute organic brain syndrome any disorder (as sudden confusion or disorientation) in an otherwise normal person that is due to reversible (temporary) impairment of brain tissues (as by head injuries or drugs or infection)
  3. binge-purge syndrome a disorder of eating in which the person alternates between strong craving for food and aversion to food; characterized by excessive eating followed by periods of fasting or self-induced vomiting
  4. Munchausen syndrome syndrome consisting of feigning acute and dramatic illness for which no clinical evidence is ever found
  5. Guillain-Barre syndrome a form of peripheral polyneuritis characterized by pain and weakness and sometimes paralysis of the limbs; cause is unknown
  6. Horner's syndrome a pattern of symptoms occurring as a result of damage to nerves in the cervical region of the spine (drooping eyelids and constricted pupils and absence of facial sweating)
  7. premenstrual syndrome a syndrome that occurs in many women from 2 to 14 days before the onset of menstruation
  8. irritable bowel syndrome recurrent abdominal pain and diarrhea
  9. organ-grinder a street musician who plays a hand organ or hurdy-gurdy
  10. cervical root syndrome an abnormal condition resulting from compression of spinal nerve roots in the neck region; involves neck pains and muscular weakness and paresthesia
  11. organic disorder disorder caused by a detectable physiological or structural change in an organ
  12. Turner's syndrome a chromosomal disorder in females who have only one X chromosome; marked by dwarfism and heart abnormalities and underdeveloped sex organs
  13. organic chemistry the chemistry of compounds containing carbon
  14. radiation syndrome syndrome resulting from exposure to ionizing radiation
  15. Eaton-Lambert syndrome a disease seen in patients with lung cancer and characterized by weakness and fatigue of hip and thigh muscles and an aching back; caused by antibodies directed against the neuromuscular junctions
  16. Parkinson's syndrome a degenerative disorder of the central nervous system characterized by tremor and impaired muscular coordination
  17. thoracic outlet syndrome tingling sensations in the fingers
  18. Asperger's syndrome a psychiatric disorder usually noted during early school years; characterized by impaired social relations and by repetitive patterns of behavior
  19. Reiter's syndrome an inflammatory syndrome predominantly in males
  20. organic process a process occurring in living organisms