polar zone

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po·lar zone

the region in the vicinity of an electrode applied to the body.
See also: electrotonus.
References in periodicals archive ?
In particular, the researchers detected far higher levels of carbon in warm, nutrient-starved areas (195:28:1) near the equator than in cold, nutrient-rich polar zones (78:13:1).
First, a warmer Arctic reduces the temperature gradient between the temperate and polar zones.
In the end, we have found the granular structure more notable and easy to distinguish in the middle of the disc than near the limb, and in the zones near the sun's equator, more than in the polar zones.