Tesla coil

from Wiktionary, Creative Commons Attribution/Share-Alike License

• n. A type of resonant transformer circuit used to produce high voltage, low current, high frequency alternating current electricity.

from the GNU version of the Collaborative International Dictionary of English

• A transformer without iron, for high frequency alternating or oscillating currents; an oscillation transformer.

from The Century Dictionary and Cyclopedia

• n. a form of transformer for the production of oscillatory currents of high frequency and high voltage. See transformer.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• n. a step-up transformer with an air core; used to produce high voltages at high frequencies