ECCHYMOSIS
ecchymosis
(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
ecchymosis
(noun) the purple or black-and-blue area resulting from a bruise
Source: WordNet® 3.1
Etymology
Noun
ecchymosis (countable and uncountable, plural ecchymoses)
A skin discoloration caused by bleeding underneath the skin; a bruise.
The leaking of blood into the tissues of the body as a result of a bruise.
Source: Wiktionary
Ec`chy*mo"sis, n.; pl. Ecchymoses (. Etym: [NL., fr. Gr. (Med.)
Definition: A livid or black and blue spot, produced by the extravasation
or effusion of blood into the areolar tissue from a contusion.
Source: Webster’s Unabridged Dictionary 1913 Edition