Wheatstone bridge

noun, Electricity
1.
a circuit for measuring an unknown resistance by comparing it with known resistances.
Also, Wheatstone's bridge.
Compare bridge (def 9), null method
Origin
1870-75; named after C. Wheatstone
British Dictionary definitions for Wheatstone bridge

Wheatstone bridge

/ˈwiːtstən/
noun
1.
a device for determining the value of an unknown resistance by comparison with a known standard resistance
Word Origin
C19: named after Sir Charles Wheatstone (1802–75), British physicist and inventor