amyloid

noun
am·​y·​loid | \ ˈa-mə-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

Keep scrolling for more

Other Words from amyloid

amyloid adjective

Examples of amyloid in a Sentence

Recent Examples on the Web

In 2015, imaging tests revealed the presence of amyloid plaques, the sticky proteins associated with Alzheimer’s disease that collect around brain cells and interfere with relaying messages. Linda Marsa, Discover Magazine, "A New Treatment for Alzheimer's? It Starts With Lifestyle," 16 Nov. 2018 Researchers are finding that Alzheimer’s symptoms and the presence of amyloid and tau do not necessarily go hand in hand. Linda Marsa, Discover Magazine, "A New Treatment for Alzheimer's? It Starts With Lifestyle," 16 Nov. 2018 For families affected by dementia, trials of anti-Alzheimer’s drugs aimed at breaking up tangles of amyloid or tau protein deposits in the brain can seem plodding and remote. Robert Weisman, BostonGlobe.com, "As drug development flounders, people fearing Alzheimer’s embrace lifestyle changes," 24 June 2018 There have been hints that amyloids weren’t the toxic bad boys solely responsible for the destruction of vital brain circuits. Linda Marsa, Discover Magazine, "A New Treatment for Alzheimer's? It Starts With Lifestyle," 16 Nov. 2018 Its cause isn’t fully understood, but plaques (clumps of a protein called beta-amyloid, which harms brain cells) are often involved, as are tangles in the system the brain uses to transport nutrients. Korin Miller, SELF, "What’s the Difference Between Normal Age-Related Memory Decline and Signs of Dementia?," 26 Oct. 2018 Like several others that failed, the drug targeted a protein called amyloid, thought to be a cause of the disease. Ed Silverman, STAT, "Pharmalittle: Another Alzheimer’s drug failure; HHS wants pharma to voluntarily lower prices," 12 June 2018 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

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.

See More

First Known Use of amyloid

1866, in the meaning defined above

Keep scrolling for more

Learn More about amyloid

Statistics for amyloid

Last Updated

14 Jan 2019

Look-up Popularity

Time Traveler for amyloid

The first known use of amyloid was in 1866

See more words from the same year

Keep scrolling for more

More Definitions for amyloid

amyloid

noun
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

Britannica.com: Encyclopedia article about amyloid

Comments on amyloid

What made you want to look up amyloid? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

tremendous in size, volume, or degree

Get Word of the Day daily email!

Test Your Vocabulary

Homophone Quiz

  • three-bears-two-of-them-look-like-theyre-whispering-to-a-third-bear-who-looks-chuffed-to-be-the-center-of-attention
  • In order to judge how people felt, the senator's office hired a firm to take a ______.
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!