am·​y·​loid | \-ˌlȯid \

Definition of amyloid 

: 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

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Other Words from amyloid

amyloid adjective

Examples of amyloid in a Sentence

Recent Examples on the Web

This extra chromosome material contains the gene that produces those beta-amyloid plaques that can harm brain cells, the NIA explains. Korin Miller, SELF, "10 Facts About Alzheimer's Disease You Should Know," 28 Sep. 2018 Many researchers believe the accumulation of amyloid beta in the brain leads to cell death and Alzheimer’s. Peter Loftus, WSJ, "Alzheimer’s Drug Shows Benefit, But Some Experts Say More Testing Needed," 25 July 2018 By detecting biomarkers that suggest the buildup of amyloid beta protein, which leads to plaque buildups in the brains of Alzheimer’s patients. Sy Mukherjee, Fortune, "Brainstorm Health: Right to Try, Alzheimer's Blood Test, Vertex Cystic Fibrosis Trials," 1 Feb. 2018 The companies also said the drug reduced the amount of clumps of a protein called beta amyloid that build up in the brains of patients. Peter Loftus, WSJ, "Drugmakers Call Experimental Alzheimer’s Drug Study Positive," 6 July 2018 Praticò said that previous work showed that zileuton can also impact amyloid. Stacey Burling,, "An asthma drug shows promise against Alzheimer's," 8 June 2018 Many drugmakers have pursued the theory that targeting amyloid could slow or halt the progression of Alzheimer’s. Peter Loftus, WSJ, "Eli Lilly, AstraZeneca Drop Two Late-Stage Alzheimer’s Drug Trials," 12 June 2018 Other trials did not make sure that their patients actually had amyloid. Joshua Kendall,, "Can this doctor figure out how to stop Alzheimer’s before it starts?," 11 June 2018 The drug is also unique among the amyloid busters that came before. Alice Park, Time, "Inside One Couple’s Experimental Treatment to Battle Alzheimer’s Disease," 15 Feb. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'amyloid.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of amyloid

1866, in the meaning defined above

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Last Updated

18 Nov 2018

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The first known use of amyloid was in 1866

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am·​y·​loid | \ˈam-ə-ˌlȯid\

Medical Definition of amyloid 

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

Other Words from amyloid

amyloid adjective

More from Merriam-Webster on amyloid Encyclopedia article about amyloid

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