megathermic
/ˌmɛɡəˈθəːmɪk/Ecology
adjective
Designating, relating to, or consisting of a plant or plants requiring a very warm habitat; (of a climate or habitat) characterized by or appropriate to megatherms, very warm.
Origin
Early 20th century; earliest use found in William Fisher (1846–1910). From megatherm + -ic, after German megatherm, adjective.