subchronic

synonyms: semichronic, subacute
https://doi.org/10.1351/goldbook.16105
Repeated over a short period, usually about \(\pu{10\%}\) of the life span; an imprecise term used to describe exposures of intermediate duration.
Source:
PAC, 2007, 79, 1153. (Glossary of terms used in toxicology, 2nd edition (IUPAC Recommendations 2007)) on page 1315 [Terms] [Paper]