The passage of blood from ruptured blood vessels into subcutaneous tissue, marked by a purple discoloration of the skin.
[New Latin, from Greek ekkhumōsis, extravasation, from ekkhumousthai, to extravasate : ek-, out; see ECTO- + khumos, juice; see gheu- in the Appendix of Indo-European roots.]
ec′chy·motic (-mŏtĭk) adj.
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