amyloid beta

noun

variants or amyloid-beta
ˈa-mə-ˌlȯid-ˈbā-tə How to pronounce amyloid beta (audio)
 chiefly British  -ˌbē-tə
or amyloid beta protein or amyloid-beta protein or amyloid beta peptide or amyloid-beta peptide
: beta-amyloid
In Alzheimer's, the possible infectious agent under scrutiny is a protein called amyloid-beta best known as the main ingredient in the hulking, sticky gobs of plaque found in the brains of people with the disease. Laura Sanders
In Alzheimer's patients, the amyloid beta protein somehow goes off track and clumps together in sticky plaques that destroy healthy brain tissue. Nancy McVicar

Word History

First Known Use

1987, in the meaning defined above

Time Traveler
The first known use of amyloid beta was in 1987

Dictionary Entries Near amyloid beta

Cite this Entry

“Amyloid beta.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/amyloid%20beta. Accessed 30 Nov. 2022.

Medical Definition

amyloid beta

noun

variants or amyloid-beta or amyloid beta protein or amyloid-beta protein or amyloid beta peptide or amyloid-beta protein
: beta-amyloid
Small amounts of amyloid beta are generated as an ordinary metabolic byproduct and are believed to do no harm, but larger amounts seem to be tied to Alzheimer's. January W. Payne, U.S. News & World Report
In Alzheimer's patients, the amyloid beta protein somehow goes off track and clumps together in sticky plaques that destroy healthy brain tissue. Nancy McVicar, The Sun-Sentinel (Fort Lauderdale, Florida)
The treatment targets the buildup of lumps of protein fragments called amyloid beta peptides, which is the dominant theory of the cause of Alzheimer's. Victoria Colliver, The San Francisco Chronicle
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