[n] the process of exuding or passing out of a vessel into surrounding tissues; said or blood or lymph or urine
[n] (of volcanos) pouring out fumes or lava (or a deposit so formed)
[n] an extravasated liquid (blood or lymph or urine); the product of extravasation
\Ex*trav`a*sa"tion\, n. [Cf. F. extravasation.] The act of forcing or letting out of its proper vessels or ducts, as a fluid; effusion; as, an extravasation of blood after a rupture of the vessels.
\Ex*trav`a*sa"tion\, n. (Geol.) The issue of lava and other volcanic products from the earth.