amyloid

noun

am·​y·​loid ˈa-mə-ˌlȯid How to pronounce amyloid (audio)
: a waxy translucent substance consisting primarily of protein that is deposited in some animal organs and tissues under abnormal conditions (such as Alzheimer's disease) compare beta-amyloid
amyloid adjective

Examples of amyloid 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.
That said, amyloid is not the whole story on preventing or delaying Alzheimer’s onset. Juergen Eckhardt, Forbes.com, 22 July 2025 According to Lesley, the presence of amyloid doesn’t guarantee the development of Alzheimer’s, or any other type of dementia, or impairment of function. Elizabeth Yuko, Flow Space, 5 June 2025 The drug also enhanced the microglia's ability to clear amyloid aggregates from the brain. Paul McClure 20, New Atlas, 20 May 2025 It is designed for the early detection of amyloid, a protein that can build up in the brain and is a hallmark of Alzheimer’s, the most common form of dementia in the elderly. Bloomberg News, Boston Herald, 17 May 2025 See All Example Sentences for amyloid

Word History

First Known Use

1866, in the meaning defined above

Time Traveler
The first known use of amyloid was in 1866

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Cite this Entry

“Amyloid.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/amyloid. Accessed 29 Jul. 2025.

Medical Definition

amyloid

noun
am·​y·​loid
ˈam-ə-ˌlȯid
1
: a nonnitrogenous starchy food
2
: a waxy translucent substance consisting primarily of protein that is deposited in some animal organs and tissue under abnormal conditions (as in Alzheimer's disease) see beta-amyloid
amyloid adjective

More from Merriam-Webster on amyloid

Last Updated: - Updated example sentences
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