| n. | 1. | The act of forcing or letting out of its proper vessels or ducts, as a fluid; effusion; |
| 2. | (Geol.) The issue of lava and other volcanic products from the earth. |
| Noun | 1. | extravasation - an extravasated liquid (blood or lymph or urine); the product of extravasation |
| 2. | extravasation - (of volcanos) pouring out fumes or lava (or a deposit so formed) Synonyms: eructation, eruption | |
| 3. | extravasation - the process of exuding or passing out of a vessel into surrounding tissues; said or blood or lymph or urine |