toxicity exposure ratio

initialism: TER
https://doi.org/10.1351/goldbook.16226
Ratio of the measure of the effects (e.g., \(\pu{LD_{50}}\), \(\pu{LC_{50}}\), NOEC) to the estimated exposure.
Note: It is the reciprocal of a risk quotient or hazard quotient.
Source:
PAC, 2007, 79, 1153. (Glossary of terms used in toxicology, 2nd edition (IUPAC Recommendations 2007)) on page 1325 [Terms] [Paper]