Wallace's line

noun
Wal·lace's line | \ ˈwä-lə-səz- \

Definition of Wallace's line 

: a hypothetical boundary that separates the highly distinctive faunas of the Asian and Australian biogeographic regions and passes between the islands of Bali and Lombok in Indonesia, between Borneo and Sulawesi, and between the Philippines and the Moluccas

First Known Use of Wallace's line

circa 1868, in the meaning defined above

History and Etymology for Wallace's line

Alfred Russel Wallace

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The first known use of Wallace's line was circa 1868

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