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current |
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current /cur·rent/ (kur´ent) 1. anything that flows. 2. electric c. action current the current generated in the cell membrane of a nerve or muscle by the action potential. alternating current a current which periodically flows in opposite directions. convection current a current caused by movement by convection of warmer fluid into an area of cooler fluid. direct current a current flowing in one direction only. electric current the stream of electricity that moves along a conductor. Symbol I . galvanic current a steady direct current, especially one produced chemically. current of injury a flow of current to (systolic c. of injury) or from (diastolic c. of injury) the injured region of an ischemic heart, due to regional alteration in transmembrane potential. pacemaker current the small net positive current flowing into certain cardiac cells, such as those of the sinoatrial node, causing them to depolarize.
current, n a measure of the number of electrons per second that pass a given point on a conductor. current, alternating, n a current that alternately changes its direction of flow. It usually consists of 60 complete cycles/sec. current, coagulating, n an electrical current, delivered by a needle, ball, or other variously shaped points, that coagulates tissue. current dental terminology (CDT), n a listing of descriptive terms and identifying codes developed by the American Dental Association (ADA) for reporting dental services and procedures to dental benefits plans. current, direct, n an electrical current in which the electron flow is in only one direction. current, galvanic, n a direct current created by a battery. current procedural terminology (CPT), n a listing of descriptive terms and identifying codes developed by the American Medical Association (AMA) for reporting practitioner services and procedures to medical plans and medicare. n the maximum current in a roentgen-ray tube that fully uses all electrons that are available at the cathode for the production of roentgen rays. current that which flows; electric transmission in a circuit. alternating current a current that flows in opposite directions sinusoidally. direct current a current whose direction is always the same. |
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This primary structure carries purlins and rafters in the normal way, with the rafters strutted at the same angle as the struts on the tied portals, creating in effect an inverted ridge that acts as a continuous lantern because, above it, the real ridge is defined by a motorized greenhouse glazing system that can be thrown open on hot days to encourage cooling convection currents. Researchers who study the chemistry of lavas, however, argue that the mantle resembles a double boiler, with separate upper and lower layers that each have their own systems of convection currents. But on top of this essentially humdrum parti are swooping glass roofs that can both capture solar energy and use it to generate convection currents to ventilate the spaces. |
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Convection current
