Noun(1) a unit of conductance equal to the reciprocal of an ohm,engineer who was a brother of Ernst Werner von Siemens and who moved to England (1823-1883),German electrical engineer (1816-1892)(2) a unit of conductance equal to the reciprocal of an ohm(3) engineer who was a brother of Ernst Werner von Siemens and who moved to England (1823-1883)(4) German electrical engineer (1816-1892)
Noun(1) a unit of conductance equal to the reciprocal of an ohm,engineer who was a brother of Ernst Werner von Siemens and who moved to England (1823-1883),German electrical engineer (1816-1892)(2) a unit of conductance equal to the reciprocal of an ohm(3) engineer who was a brother of Ernst Werner von Siemens and who moved to England (1823-1883)(4) German electrical engineer (1816-1892)
(1) Since 1860 to the middle of 20th century, siemens or siemens mercury unit, was the unit of electrical resistance.(2) If you're looking for a pattern here, Siemens , Celsius, and Hertz are all surnames of famous scientists, the names of which, sadly, tell us less about the nature of the units than the units' original designations.