minimum significant difference

initialism: MSD
https://doi.org/10.1351/goldbook.14857
Difference between groups (in tests with, e.g., salmonid fish, the difference in average weights or average mortality) that would have to occur before it could be concluded that there was a significant difference between the groups.
Note: The MSD is provided by Dunnett’s multiple range test.
Source:
PAC, 2009, 81, 829. (Glossary of terms used in ecotoxicology (IUPAC Recommendations 2009)) on page 916 [Terms] [Paper]