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.
[1913 Webster]