verb (used with object), extravasated, extravasating.
Pathology. to force out from the proper vessels, as blood, especially so as to diffuse through the surrounding tissues.
Geology. to pour forth, as lava, from a subterranean source in a molten state.
verb (used without object), extravasated, extravasating.
Pathology. to be extravasated, as blood.
Geology. to pour forth lava or the like.
Pathology. the extravasated material; extravasation.

1655–65; extra- + vas + -ate1

unextravasated, adjective
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World English Dictionary
extravasate (ɪkˈstrævəˌseɪt)
1.  pathol to cause (blood or lymph) to escape or (of blood or lymph) to escape into the surrounding tissues from their proper vessels
2.  to exude (molten material, such as lava) or (of molten material) to be exuded
3.  pathol the material extravasated
[C17: from Latin extra- + vās vessel]

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

extravasate ex·trav·a·sate (ĭk-strāv'ə-sāt')
v. ex·trav·a·sat·ed, ex·trav·a·sat·ing, ex·trav·a·sates
To exude from or pass out of a vessel into the tissues. Used of blood, lymph, or urine.

ex·trav'a·sate' or ex·trav'a·sa'tion n.
The American Heritage® Stedman's Medical Dictionary
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