no-observed-effect concentration

in aquatic toxicology
initialism: NOEC
https://doi.org/10.1351/goldbook.14885
Special case of the no-observed-effect level (NOEL), commonly used in aquatic toxicology.
Note: When derived from a life-cycle or partial life-cycle test, it is numerically the same as the lower limit of the maximum acceptable toxicant concentration (MATC).
Source:
PAC, 2009, 81, 829. (Glossary of terms used in ecotoxicology (IUPAC Recommendations 2009)) on page 921 [Terms] [Paper]