n pl 1  sing or pl in constr  :  any of various abnormal conditions of domestic mammals and birds associated with damage to the central nervous system and marked by incoordination and a reeling unsteady gait - see BLIND STAGGERS  - compare GRASS TETANY   2  :  vertigo occurring as a symptom of decompression sickness : also  :  DECOMPRESSION SICKNESS .
 
 
 
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