[Noun] A group of illnesses affecting the nerves in the brain and spine so that the person becomes weaker and weaker until death.
Example: Stephen Hawking is a famous person with motor neurone disease.
Found on
http://www.bbc.co.uk/skillswise/glossary/

Motor neurone disease: Motor neuron disease. 'His suffering from motor neurone disease (MND) was finally over because he had chosen to die.' (article by Lesley Close in The Guardian, May 25, 2004) Common Misspellings: motor neurone diease, motor neurone desease
Found on
http://www.medterms.com/script/main/art.asp?articlekey=32775

Motor neurone disease is a progressively degenerative disease of the motor system causing muscle weakness and wasting.
Found on
http://www.probertencyclopaedia.com/browse/EM.HTM

degeneration of the nerves in the spinal cord and brain that are responsible for muscle movement, causing weakness and muscle deterioration
Found on
https://www.encyclo.co.uk/local/20875
No exact match found.