(n) a medical instrument that records several physiological processes simultaneously (e.g., pulse rate and blood pressure and respiration and perspiration)
The Collaborative International Dictionary of English (GCIDE) v.0.53 Collaborative International Dictionary (GCIDE)
n. [ Gr. &unr_; writing much; poly`s much, many + &unr_; to write: cf. F. polygraphe. ] 1. An instrument for multiplying copies of a writing; a manifold writer; a copying machine. [ 1913 Webster ]
2. In bibliography, a collection of different works, either by one or several authors. Brande & C. [ 1913 Webster ]