acrocyanosis

noun
ac·​ro·​cy·​a·​no·​sis | \ˌak-rō-ˌsī-ə-ˈnō-səs \
plural acrocyanoses\-​ˌsēz \

Medical Definition of acrocyanosis 

: blueness or pallor of the extremities usually associated with pain and numbness and caused by vasomotor disturbances (as in Raynaud's disease) specifically : a disorder of the arterioles of the exposed parts of the hands and feet involving abnormal contraction of the arteriolar walls intensified by exposure to cold and resulting in bluish mottled skin, chilling, and sweating of the affected parts

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