Plural of galvnocautery; medical instruments that use electric current to burn or cauterize tissue.
From galvano- (relating to galvanism/electricity) plus cautery (from Greek kauteria, burning). These were 19th-century medical devices combining electrical current with heat.
Before modern surgical lasers, doctors used galvanocauteries—devices powered by electrical current—to precisely burn away tumors and stop bleeding, making them the ancestors of today's surgical cautery devices!
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