noun
a bluish discoloration of the skin resulting from poor circulation or inadequate oxygenation of the blood
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Cyanosis is a medical condition characterized by a bluish discoloration of the skin and mucous membranes due to insufficient oxygen in the blood.
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If you notice any cyanosis in your skin, it could be a sign of low oxygen levels.
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Yo, that dude's lips were straight up cyanosis, he needs to catch some breath!
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The dark clouds looming over the city gave it a cyanosis-like appearance, signaling an impending storm.