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definitions

wear-and-tear pigment

[wâr′ənd-târ′]
n.
  1. Lipofuscin that accumulates in aging or atrophic cells as a residue of lysosomal digestion.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.