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| CINQUEFOIL
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A circular design made of five converging lobes, giving the appearance of a flower with petals |
| CIPOLIN
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Italian marble with alternating streaks or layers of color, often green and white. |
| CIRCA
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Approximate date. |
| CIRCLE
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A plane figure bounded by a single curved line every point of which is equally distant from the point at the center of the figure. A circle shaped plate, which hold a transit telescope. |
| CIRCLE CUTTER
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This tool with a center shaft in which a drill bit is mounted with an adjustable cutter blade mounted on an adjustable arm perpendicular to the center shaft is used to cut a wide range of diameters. The speed of the cutting must be closely controlled with the rotating cutter blade being an off-center out of balance mass, which is difficult to guide. The center shaft is mounted in a drill motor and the cutter scribes a circle on the work and cuts its way through the work as the center shaft rotates. The cutting blade is often carbide tipped to cut through a wide variety of materials. |
| CIRCLEHEAD WINDOW
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Half oval window, which is usually small and placed over a doorway to serve a decorative purpose. Some windows may be hinged at either end to permit opening for ventilation. |
| CIRCUIT
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Arrangement of electrical conductors that allow the flow of electrical current. A complete or partial path for the flow of electrical current; any hookup or wiring that is connected into that path, such as radio, television, etc. |
| CIRCUIT BREAKER
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A device used to interrupt or break an electrical circuit when an overload condition exists; usually installed in the positive circuit; used to protect electrical equipment. |
| CIRCUIT LAG
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As time increases from zero at the terminals of an inductor, the voltage comes to a particular value on the sine function curve ahead of the current. The voltage reaches its negative peak exactly 90 degrees before the current reaches its negative peak thus the current lags behind by 90 degrees. |
| CIRCUIT TESTER
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A small lamp, used to check for live current, which will glow if the current is active in the electrical receptacle into which it is inserted |
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