Rheotome

Origin

From -("flow, current") + tome("cutter") + -, literally “flow cutter”.

Full definition of rheotome

Noun

1. Any instrument that interrupts an electric current.
• 1884, George Calvin Pitzer, Electricity in medicine and surgery, p. 30.By means of the rheotome, the primary current is broken and closed rapidly, so that the induced current seems almost like a continuous one.