ecchymosis
/ˌekɪˈməʊsɪs/noun
(pl. ecchymoses /-si: z/)
- Medicine a discoloration of the skin resulting from bleeding underneath, typically caused by bruising【医】（尤指因淤血引起的）淤斑。
词源
mid 16th cent.: modern Latin, from Greek ekkhumōsis 'escape of blood', from ekkhumonathai 'force out blood'.