- 1. Any instrument that performs an analysis. 2. The prism in a polariscope by means of which the polarized light is examined. 3. The neural basis of the conditioned reflex; includes all of the sensory side of the reflex arc and its central connections. 4. A device that electronically determines the frequency and amplitude of a particular channel of an electroencephalogram.- batch a. a discrete automated chemical a. in which the instrument system sequentially performs a single test on each of a group of samples.- centrifugal fast a. an automatic spectrophotometer that uses centrifugal force to mix samples and reagents, and propels the reactants at high speed in view of a detector that makes multiple absorbance readings.- continuous flow a. an automated chemical a. in which the samples and reagents are pumped continuously through a system of modules interconnected by tubing.- discrete a. an automated chemical a. in which the instrument performs tests on samples that are kept in discrete containers in contrast to a continuous flow a..- kinetic a. an instrument that measures the rate of change in a chemical substance; used mainly for enzyme measurement.- pulse height a. electronic circuitry that determines the energy of scintillations recorded by a detector, allowing use of a discriminator to select for photons of a specific type.
Medical dictionary. 2011.