Huntington’s disease - definition and synonyms

noun [uncountable] medical 

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/ˈhʌntɪŋtənz dɪˌziːz/
  1. a serious and incurable illness in which a person’s brain cells deteriorate, causing jerky movements and a loss of the ability to think and remember This meaning is based on one submitted to the Open Dictionary by: Darshi from India on 16/07/2015