Source : Webster's Revised Unabridged Dictionary (1913)

Kymograph \Ky"mo*graph\, n. [Gr. ? wave + -graph.] (Physiol.)
   An instrument for measuring, and recording graphically, the
   pressure of the blood in any of the blood vessels of a living
   animal; -- called also {kymographion}.

Source : WordNet®

kymograph
     n : scientific instrument consisting of a rotating drum holding
         paper on which a stylus traces a continuous record (as of
         breathing or blood pressure) [syn: {cymograph}]