biome bi·ome (bī'ōm')
The total complex of biotic communities occupying and characterizing a particular area or zone, such as a desert or deciduous forest.
A large community of plants and animals that occupies a distinct region. Terrestrial biomes, typically defined by their climate and dominant vegetation, include grassland, tundra, desert, tropical rainforest, and deciduous and coniferous forests. There are two basic aquatic biomes, freshwater and marine, which are sometimes further broken down into categories such as lakes and rivers or pelagic, benthic, and intertidal zones.