/ Dictionary / Index T Tesla coil: Meaning and Definition of Find definitions for: Tes'la coil" Pronunciation: [key] — Elect. Elect. an air-core transformer used to produce high voltages of high-frequency alternating currents. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. tesla TESOL Related Content Daily Word Quiz: endear Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language