resistance, R 

https://doi.org/10.1351/goldbook.R05315
Electric potential difference divided by the electric current when there is no electromotive force in a conductor.
Source:
PAC, 1996, 68, 957. (Glossary of terms in quantities and units in Clinical Chemistry (IUPAC-IFCC Recommendations 1996)) on page 990 [Terms] [Paper]