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From synchro- + -scope, from syn- + chrono- + -scope, from Ancient Greek σύν (sún)+χρόνος (khrónos)+σκοπέω (skopéō).
Etymology from Wiktionary, CC BY-SA 4.0.
synchroscope
Today it means: An instrument that indicates the degree to which two alternating current systems are synchronised with each other; used especially in electricity generation. Full definition →