noun, plural mhos. Electricity.

See under siemens.

Also called reciprocal ohm.


[see-muh nz]

noun (used with a singular verb)

Electricity. the standard unit of electrical conductance in the International System of Units(SI), equal to the reciprocal of the ohm and replacing the equivalent MKS unit (mho). Abbreviation: S

Origin of siemens

First recorded in 1930–35; named after Sir W. Siemens Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for mho

Historical Examples of mho

British Dictionary definitions for mho


noun plural mhos

the former name for siemens

Word Origin for mho

C19: formed by reversing the letters of ohm (first used by Lord Kelvin)



Ernst Werner von (ɛrnst ˈvɛrnər fɔn). 1816–92, German engineer, inventor, and pioneer in telegraphy. Among his inventions are the self-excited dynamo and an electrolytic refining process
his brother, Sir William, original name Karl Wilhelm Siemens. 1823–83, British engineer, born in Germany, who invented the open-hearth process for making steel


noun plural siemens

the derived SI unit of electrical conductance equal to 1 reciprocal ohmSymbol: S Formerly called: mho
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medicine definitions for mho



n. pl. mhos

A siemens.



n. pl. siemens

A unit of electrical conductance in the International System of Units, equal to one ampere per volt.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Science definitions for mho



The SI derived unit of electrical conductance, equal to one ampere per volt. It is equivalent to the reciprocal of the ohm unit. Also called siemens



Plural siemens

See mho.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.