Cyanosis:A bluish color of theskinand themucousmembranes due to insufficientoxygenintheblood. For example, thelipscan develop cynanosis when exposed to extremecold.Cyanosiscan be present at birth, as in a 'blue baby,' aninfantwith amalformationof theheartthat permits into the arterial system blood that is not fully oxygenated.
