From Longman Dictionary of Contemporary Englishmagnetomag‧ne‧to /mæɡˈniːtəʊ $ -toʊ/ noun (plural magnetos) [countable] TEETTCa piece of equipment containing one or more magnets that is used for producing electricity, especially in the engine of a car
Examples from the Corpus
magneto• The same contrast applied to the rocker covers and magnetos.• All light aircraft maintenance workshops would most certainly have one for synchronizing and timing port and starboard magnetos on piston engines.• I immediately chopped both engines, pulled the mixtures back and turned off the magnetos and master.Origin magneto (1800-1900) magneto-electric machine 