amyloid beta

noun
variants: or amyloid beta protein or amyloid beta peptide

Medical Definition of amyloid beta 

: 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, 1 Aug. 2009 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), 19 Feb. 2002 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, 8 May 2009

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