D defs.my
Entry 1 sense Webster, 1913

Plethysmograph

· Pleth·ys·mo·graph · IPA /plɛˈðɪz.məˌɡɹæf/
01 n. 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 i…
  1. 1.
    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.(Physiol.)