Dictionary entry

Diapedesis

Webster's Dictionary 1913

‖Di′a‐pe‐de″sis (?), n. [NL., fr. Gr. � a leaping or oozing through, fr. � to leap through; διά through + � to leap.] (Med.) The passage of the corpuscular elements of the blood from the blood vessels into the surrounding tissues, without rupture of the walls of the blood vessels.