palaeogean
/ˌpaliːə(ʊ)ˈdʒiːən/ /ˌpeɪliːə(ʊ)ˈdʒiːən/(also palaeogaean, paleogean)
adjective
Biology. Of or relating to the Old World or Eastern hemisphere considered as a biogeographical region.
Origin
Mid 19th century; earliest use found in Philip Lutley Sclater (1829–1913), zoologist. From palaeo- + ancient Greek γαῖα, γῆ the earth + -an.