biochore
/ˈbʌɪə(ʊ)kɔː/Ecology
noun
A group of similar biotopes; a subdivision of the biosphere (with various possible ranks), (also) specifically the largest such division, as forest, desert, grassland, etc.
Origin
Early 20th century (in an earlier sense). From German Biochore from bio- + ancient Greek χώρα place, country.