Tocsin (noun)
tocsin [tok-sin]

noun
1. a signal, especially of alarm, sounded on a bell or bells.
2. a bell used to sound an alarm.

Origin: 1580-90; < Middle French < Provençal tocasenh literally, (it) strikes (the) bell, equivalent to toca, 3rd singular present of tocar to strike, touch + senh bell, sign

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