— diapedetic /duy'euh pi det"ik/ , adj.
/duy'euh pi dee"sis/ , n. Physiol.
the passage of blood cells, esp. leukocytes, through the unruptured walls of the capillaries into the tissues.
[ 1615-25; diapédesis a leaping through, equiv. to diapede- (verbid s. of diapedân to leap through) + -sis -SIS ]