neurodegenerative disease

noun

variants or neurodegenerative disorder
plural neurodegenerative diseases or neurodegenerative disorders
: a chronic progressive disease (such as Alzheimer's disease, Parkinson's disease, or amyotrophic lateral sclerosis) that is characterized especially by the gradual deterioration or impaired function of neurons of the nervous system and especially the brain and that usually manifests later in life
Neurodegenerative diseases remain among the most complex and least understood conditions in modern medicine, with few effective treatments available for patients and families facing diagnoses …Columbian-Progress (Mississippi)
… there is a link between repeated head impacts and long-term brain health consequences, like developing into neurodegenerative diseases such as dementia.Lindsay Starling, quoted in The Observer (London)
Huntington's is a rare, inherited neurodegenerative disorder that gradually deteriorates a person's physical and mental abilities, often leading to death within 10 to 30 years of onset.Katherine Gaither

Examples of neurodegenerative disease in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Sandra Bullock has opened up about the loss of her partner Bryan Randall and his private battle with neurodegenerative disease ALS. Charlotte Reck, CNN Money, 20 Aug. 2026 More research has been focused on looking into how transformations like these impact our chances of developing neurodegenerative diseases like dementia. Helen Carefoot, Flow Space, 14 Aug. 2026 Real people went outside and dumped buckets of ice on their heads, ostensibly to spread awareness of a neurodegenerative disease. Matt Carlstrom, Vanity Fair, 14 Aug. 2026 People whose jobs expose them to pesticides have about a 60% higher risk of developing the neurodegenerative disease ALS, new research has found. Aria Bendix, NBC news, 4 Aug. 2026 See All Example Sentences for neurodegenerative disease

Word History

First Known Use

1965, in the meaning defined above

Time Traveler
The first known use of neurodegenerative disease was in 1965

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Cite this Entry

“Neurodegenerative disease.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/neurodegenerative%20disease. Accessed 25 Aug. 2026.

Medical Definition

neurodegenerative disease

noun
variants or neurodegenerative disorder
: a chronic progressive disease (such as Alzheimer's disease, Parkinson's disease, or amyotrophic lateral sclerosis) that is characterized especially by the gradual deterioration or impaired function of neurons of the nervous system and especially the brain and that usually manifests later in life
Filamentous deposits made of the microtubule-associated protein tau are a defining characteristic of a number of neurodegenerative diseases, including Alzheimer disease …Maria Grazia Spillantini et al., The Journal of the American Medical Association
The chronicity of neurodegenerative diseases allows the brain to engage compensatory mechanisms—for example, increasing neuronal activity in undamaged brain regions that normally participate in affected functions …Jorge J. Palop et al., Nature
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