The Collaborative International Dictionary
Extravasate \Ex*trav"a*sate\, v. t. [imp. & p. p. Extravasated; p. pr. & vb. n. Extravasating.] [Pref. extra- + L. vas vessel: cf. F. extravaser. See Vase.] To force or let out of the proper vessels or arteries, as blood.
Extravasate \Ex*trav"a*sate\, v. i. [See Extravasate, v. t.] (Physiol.) To pass by infiltration or effusion from the normal channel, such as a blood vessel or a lymphatic, into the surrounding tissue; -- said of blood, lymph, etc.
Wiktionary
Outside of a vessel. n. That which is outside a vessel (especially blood or other bodily fluids) v
To flow (or be forced) from a vessel
WordNet
Usage examples of "extravasate".
The Major observed that the flesh of his wrists was deeply furrowed, showing a ring of extravasated blood.
It had, however, broad maculations of bluish black, obviously caused by extravasated blood from contusions.
They were made by the builder caste, the largest of all the vassals, who chewed soil and mixed it with an epoxy chemical extravasated in their mouth ducts, producing a strong cement.
Although I find no depressed fracture in this case, which is the usual reason for trepanning, I fear that there may be a clot of extravasated blood under the point of impact which is having the same effect.
English army which had given him a bioware endocrine gland implant, a sophisticated construct of neurosecretory cells which consumed his blood and extravasated psi-stimulant neurohormones under the control of a cortical processor.
Although I find no depressed fracture in this case, which is the usual reason for trepanning, I fear that there may be a clot of extravasated blood under the point of impact which is having the same effect.