cyanosis Meaning, Definition & Usage

  1. noun a bluish discoloration of the skin and mucous membranes; a sign that oxygen in the blood is dangerously diminished (as in carbon monoxide poisoning)

WordNet

Cy`a*no"sis noun
Etymology
NL. See Cyanic.
Definitions
  1. (Med.) A condition in which, from insufficient aration of the blood, the surface of the body becomes blue. See Cyanopathy.

Webster 1913