polygraph


poly·graph

noun \ˈpäl-i-ˌgraf\

Definition of POLYGRAPH

: an instrument for simultaneously recording variations of several different pulsations (as of the pulse, blood pressure, and respiration)—see lie detector
poly·graph·ic \ˌpäl-i-ˈgraf-ik\ adjective
poly·graph·i·cal·ly \-i-k(ə-)lē\ adverb

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