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.
The pill, which was tested in some patients at his center, is designed to interrupt the process that leads to amyloid plaques, rather than removing plaques that have already formed. Jon Hamilton, NPR, 2 Sep. 2025 Nicholls, who has two copies of the APOE4 gene, dramatically changed his exercise and eating habits and within a year had reduced the amount of amyloid and tau in his blood. Sandee Lamotte, CNN Money, 25 Aug. 2025 The scientists found a build-up of a toxic protein known as amyloid-beta in the brains of the cats that had exhibited signs of the disease in life, including symptoms like confusion, disrupted sleep, and increased vocalization, or meowing. Toria Sheffield, People.com, 23 Aug. 2025 Lithium orotate helped the mice reduce production of the amyloid plaques and tau tangles, and allowed the microglial cells to remove the plaques much more effectively. The Washington Post, San Diego Union-Tribune, 19 Aug. 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 10 Sep. 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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