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(kŏn-dŭk′tăns) [L. conducere, to lead] The conducting ability of a body or a circuit for electricity. The best conductor is one that offers the least resistance such as gold, silver, or copper. When expressed as a numerical value, conductance is the reciprocal of resistance. The unit is the ohm.

airway c. ABBR: GAW. The amount of airflow divided by the amount of pressure that produces it; a measure of the ability of the respiratory airways to maintain airflow.

conduct disorder

Abnormally aggressive, disruptive, hostile, violent, or abusive behavior, usually beginning in adolescence, and more common in boys than in girls. The disorder is persistent, rather than intermittent, and severe, rather than mild or moderate in presentation. Its hallmarks include criminality, defiant behavior, impulsiveness, and substance abuse.


(kŏn-dŭk′shŭn) 1. The process whereby a state of excitation affects adjacent portions of a tissue or cell, so that the disturbance is transmitted to remote points. Conduction occurs not only in the fibers of the nervous system but also in muscle fibers. 2. The transfer of electrons, ions, heat, or sound waves through a conductor or conducting medium.

aberrant c. The movement of electrical impulses through the heart along diseased or accessory pathways.

air c. The conduction of sound to the inner ear via the pathway provided by the air in the ear canal.

bone c. Sound conduction through the cranial bones.

conduction system of the heart

Specialized myocytes in the heart that conduct the electrical impulses throughout the heart. In order of normal conduction, the system consists of the sinoatrial node, the intra-atrial tracts, the atrioventricular node, the bundle of His, the right and left bundle branches, and the Purkinje fibers. SEE: illus.






(kŏn″dŭk-tĭv′ĭ-tē) The specific electric conducting ability of a substance. Conductivity is the reciprocal of unit resistance or resistivity. The unit is the ohm/cm. Specific conductivity is sometimes expressed as a percentage. In such cases, it is given as a percentage of the conductivity of pure copper under certain standard conditions.


(kŏn-dŭk′tŏr) 1. A medium that transmits electricity, a force, heat, or a signal. 2. A guide directing a surgical knife or probe.


(kon′doo-ĭt, ′dit) [Fr. conduit, fr L. conductus, pipe, channel] A channel, esp. one constructed surgically.

ileal c. A method of diverting the urinary flow by transplanting the ureters into a prepared and isolated segment of the ileum, which is sutured closed on one ...

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