ˌsīəˈnōsə̇s noun
( plural cyano·ses -ōˌsēz)
Etymology: New Latin, from Greek kyanōsis dark blue color, from kyan- cyan- + -ōsis -osis
: a dusky bluish or purplish discoloration of skin or mucous membranes due to deficient oxygenation of the blood either locally (as in certain vasomotor disturbances) or systemically (as in some congenital heart defects)