belonging or pertaining to a geographical division comprising the Nearctic and Palearctic regions.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use Holarctic in a sentence
But these distinctions should be and are retained in the divisions of the Holarctic.
So on the whole, this region has not developed so rapidly as the Holarctic.
There are no orders, and there seem to be no families which are found in the Holarctic and nowhere else.
In the second place, the line of migration seems to have been outward from the Holarctic region.American Weasels | E. Raymond Hall
In our part of the Holarctic, that is, the Nearctic, the familiar birds about us do not nest also in the tropical regions.
British Dictionary definitions for Holarctic
of or denoting a zoogeographical region consisting of the Palaearctic and Nearctic regions
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012