An uncommon severe form of deep vein thrombosis resulting from extensive thrombotic occlusion (blockage by a blood clot) of the major and collateral veins of an extremity. It is characterized by sudden severe pain, swelling, cyanosis and edema.

(countable and uncountable, color) A greenish-blue color. / (countable) Any of various lycaenid butterflies of the genus Jamides.

Sky-blue.

plural of cerulean

A greenish blue pigment / colour