plethysmography
Pleth`ys*mog"ra*phy, n. (Physiol.) Defn: The study, by means of the plethysmograph, of the variations in size of a limb, and hence of its blood supply.
Pleth`ys*mog"ra*phy, n. (Physiol.) Defn: The study, by means of the plethysmograph, of the variations in size of a limb, and hence of its blood supply.