noun
: a geographic region characterized by the presence of one or more ecological associations that differ at least quantitatively from those of adjoining provinces and marked by a tendency to act as a center of ecological dispersion
noun
: a geographic region characterized by the presence of one or more ecological associations that differ at least quantitatively from those of adjoining provinces and marked by a tendency to act as a center of ecological dispersion
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012