Meaning

noun a structure consisting of something wound in a continuous series of loops

noun a round shape formed by a series of concentric circles (as formed by leaves or flower petals)

noun a transformer that supplies high voltage to spark plugs in a gasoline engine

originFrom Middle English coilen, from Old French coillir, cuillir (“to gather, pluck, pick, cull”) (modern French cueillir), from Latin colligō (“to gather together”), past participle collectus, from com- (“together”) + legō (“to gather”); compare legend. Doublet of cull.

Etymology from Wiktionary, CC BY-SA 3.0