Pleth"ys*mo*graph (?), n. [Gr. an enlargement + -graph.] Physiol.
An instrument for determining and registering the variations in the size or volume of a limb, as the arm or leg, and hence the variations in the amount of blood in the limb.
-- Pleth`ys*mo*graph"ic (#), a.
<-- p. 1100 -->
<-- p. 100 -->
© Webster 1913.