abmhos
n. C2 Proficiency abmhos
n. a very old unit of measurement for how well a material conducts electricity. It is the same as the siemens, but it is rarely used today.
n. a unit of electrical conductance equal to one siemens. It is the reciprocal of the ohm and is now largely obsolete in scientific contexts.
The old equipment measured conductance in abmhos.
While modern engineers use siemens, historical records from the early 20th century often list conductance values in abmhos.
The transition from abmhos to siemens was part of a broader international effort to standardize electrical units and eliminate redundant terminology from technical literature.