mesothermal
/ˌmɛsə(ʊ)ˈθəːml/adjective
1Chiefly Ecology. Of an environment: characterized by moderate temperatures; (of an organism) inhabiting such an environment.
2 Geology. Of, relating to, or designating mineral and ore deposits formed by hydrothermal action at intermediate temperature and pressure.
3 Physics. Of the speed of an object in a plasma: less than that of the ambient electrons but higher than that of the ions.
Origin
Early 20th century; earliest use found in Bulletin of the Torrey Botanical Club. From meso- + thermal.