cyanosis
Pronunciation: sī′ă-nō′sis
Definition: A dark bluish or purplish discoloration of the skin and mucous membrane due to deficient oxygenation of the blood, evident when reduced hemoglobin in the blood exceeds 5 g/100 mL.
[G. dark blue color, fr. kyanos, blue substance]
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Examples: glitazone, GI cocktail, etc.

