'Ecchymosis' definitions:

Definition of 'ecchymosis'

(from WordNet)
noun
The purple or black-and-blue area resulting from a bruise
noun
The escape of blood from ruptured blood vessels into the surrounding tissue to form a purple or black-and-blue spot on the skin

Definition of 'Ecchymosis'

From: GCIDE
  • Ecchymosis \Ec`chy*mo"sis\, n.; pl. Ecchymoses. [NL., fr. Gr. ?, fr. ? to extravasate; 'ek out of + ? to pour.] (Med.) A livid or black and blue spot, produced by the extravasation or effusion of blood into the areolar tissue from a contusion. [1913 Webster]