megohm

[meg-ohm]

noun

Electricity.

1. a unit of resistance, equal to one million ohms. MΩ; meg

megohm

/ ˈmɛɡˌəʊm /

noun

1. MΩ. one million ohms

Word History and Origins

Origin of megohm¹

First recorded in 1865–70; meg- ( def. ) + ohm

Example Sentences

Since ten thousand ohms is equal to one-hundredth of a megohm, the time-constant would be equal to one-ten-thousandth of a second, and ten times this time-constant would be equal to a thousandth of a second.

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Convenient multiples and subdivisions of the ohm are the microhm and the megohm, the former being a millionth part of an ohm, and the latter a million ohms.

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If it has a million ohms we say it has a “megohm” of resistance.

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Usually I interpose an external resistance varying from one to five megohms according to the sensitiveness of the wire.

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In telephone cables, an insulation resistance of 500 megohms per mile at 60° Fahrenheit is the usual specification.

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