cyanosis

from WordNet (r) 3.0 (2006)

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

from The Collaborative International Dictionary of English v.0.48

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]

from Moby Thesaurus II by Grady Ward, 1.0

79 Moby Thesaurus words for "cyanosis":
      abscess, ague, anemia, ankylosis, anoxia, apnea, asphyxiation,
      asthma, ataxia, atrophy, azure, azureness, backache, bleeding,
      blennorhea, blue, blueness, bluishness, cachexia, cachexy, chill,
      chills, colic, constipation, convulsion, coughing, diarrhea,
      dizziness, dropsy, dysentery, dyspepsia, dyspnea, edema,
      emaciation, fainting, fatigue, fever, fibrillation, flux, growth,
      hemorrhage, high blood pressure, hydrops, hypertension,
      hypotension, icterus, indigestion, inflammation, insomnia, itching,
      jaundice, labored breathing, lividity, lividness,
      low blood pressure, lumbago, marasmus, nasal discharge, nausea,
      necrosis, pain, paralysis, pruritus, rash, rheum, sclerosis,
      seizure, shock, skin eruption, sneezing, sore, spasm, tabes,
      tachycardia, tumor, upset stomach, vertigo, vomiting, wasting