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Definition of Nearctic
1. a. Of or pertaining to a region of the earth's surface including all of temperate and arctic North America and Greenland. In the geographical distribution of animals, this region is marked off as the habitat certain species.
Definition of Nearctic
1. Proper noun. One of the major ecozones of the world, covering most of the North American continent. ¹
¹ Source: wiktionary.com
Medical Definition of Nearctic
1. Of or pertaining to a region of the earth's surface including all of temperate and arctic North America and Greenland. In the geographical distribution of animals, this region is marked off as the habitat certain species. Origin: Neo + arctic. Source: Websters Dictionary (01 Mar 1998)