'Cyanosis' definitions:

Definition of 'cyanosis'

From: WordNet
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)

Definition of 'Cyanosis'

From: GCIDE
  • Cyanosis \Cy`a*no"sis\ (s?`?-n?"s?s), n. [NL. See Cyanic.] (Med.) A condition in which, from insufficient a["e]ration of the blood, the surface of the body becomes blue. See Cyanopathy. [1913 Webster]