- 1. Of or pert. to the arctic regions collectively; specif. (Zoögeography), designating a realm or region including the northern parts of the Old and the New World. It comprises the Palearctic and Nearctic regions or subregions. Source: webster
- 2. Of or pert. to the arctic regions collectively; specif.(Zoögeography), Source: adambom
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holarctic
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regionsarcticcollectivelygeographypertcomprisesdesignatingnearcticnewnorthernoldpalearcticpartsrealmregionworld