minimum lethal concentration (LC min)

https://dx.doi.org/10.1351/goldbook.M03932
Lowest concentration of a toxic substance in an environmental medium that kills individual organisms or test species under a defined set of conditions. Synonymous with lowest lethal concentration found.
Source:
PAC, 1993, 65, 2003 (Glossary for chemists of terms used in toxicology (IUPAC Recommendations 1993)) on page 2071