biogeographical region

English Thesaurus

1. an area of the Earth determined by distribution of flora and fauna (noun.location)

hypernym	:	region,
definition	:	a large indefinite location on the surface of the Earth (noun.location)

hyponym	:	benthic division, benthonic zone, benthos,
definition	:	a region including the bottom of the sea and the littoral zones (noun.location)