a biogeographical division comprising the Holarctic and Paleotropical regions.
Also, Arctogea.

1865–70; < Neo-Latin, equivalent to arcto- (< Greek arkto- combining form of árktos; see arctic) + gaea (< Greek gaîa land, earth)

Arctogaean, Arctogean, Arctogaeal, Arctogeal, Arctogaeic, Arctogeic, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
Arctogaea (ˌɑːktəˈdʒiːə)
Neogaea Compare Notogaea a zoogeographical area comprising the Palaearctic, Nearctic, Oriental, and Ethiopian regions

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