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ex·trav·a·sa·tion ik-.strav-ə-'zā-shən, -'sā- n
1) the action of extravasating
2 a) an extravasated fluid (as blood) <\extravasations from the nose>
b) a deposit formed by extravasation
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n.
the leakage and spread of blood or fluid from vessels into the surrounding tissues, which follows injury, burns, inflammation, and allergy.
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ex·trav·a·sa·tion (ek-strav″ə-saґshən) [extra- + L. vas vessel] 1. a discharge or escape of blood or some other fluid normally found in a vessel or tube, into the surrounding tissues. 2. the process of being so discharged. 3. fluid that has been so discharged.Medical dictionary. 2011.