An induction coil used for producing sparks, as in an internal combustion engine. / A self-induction coil used to increase the spark in an electric gas-lighting apparatus.

plural of spark arrestor

plural of sparking plug

plural of spark spread

past tense of spark test

present of spark test

plural of spark test

(metalworking) To test for the general character of a steel, when testing a piece of steel, by grinding it, producing sparks, using color of sparks to determine its general classification.

An instance of spark testing.

(UK) Completely asleep or unconscious.