postmortem livedo

n.

A purple coloration of the skin, except in areas of contact pressure, appearing within one half to two hours after death, as a result of gravitational movement of blood within the vessels.postmortem lividity

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.