Dictionary
bioregion
noun bio·re·gion \ˈbī-ō-ˌrē-jən\
Definition of BIOREGION
: a region whose limits are naturally defined by topographic and biological features (as mountain ranges and ecosystems)
— bio·re·gion·al \ˌbī-ō-ˈrēj-nəl, -ˈrē-jə-nəl\ adjective
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First Known Use of BIOREGION
1978
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