The path or course of flow of cases or electric or other currents. [L. circuitus, a going round, fr. circum, around, + eo, pp. itus, to go]
- anesthetic c. equipment used during inhalation anesthesia to regulate concentrations of inhaled gases; includes a reservoir bag and usually directional valves, breathing tubes, and a carbon dioxide absorber.
- Papez c. a long circuitous conduction chain in the mammalian forebrain, leading from the hippocampus by way of the fornix to the mammillary body and thence returning to the hippocampus by way of, sequentially, the anterior thalamic nuclei, cingulate gyrus, and parahippocampal gyrus.
- reverberating c. a theory of periodic conduction through the cerebral cortex of trains of impulses traveling in circuits of neurons.
- signal-processing circuits the electronic hardware of hearing aid s that allows alteration in the amplification of various bands of frequencies of the acoustic signal.
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cir·cuit 'sər-kət n the complete path of an electric current including usu. the source of electric energy
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cir·cuit (surґkət) [L. circuitus] the round or course traversed by an electrical current. The circuit is said to be closed when it is continuous, so that the current may pass through it; it is open, broken, or interrupted when it is not continuous and the current cannot pass through it.Medical dictionary. 2011.