kymograph


From The Collaborative International Dictionary of English v.0.48:

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.
   [1913 Webster]
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