arcto-, arct- +

1. The region around the South Pole; such as, Antarctica and the surrounding waters.
2. As antarctic, found in, coming from, or associated with this region.

Most compound entries using this term may be spelled either Antarctic or antarctic.

An air mass that develops its characteristics over the antarctic region.

A reference to the Soiuth Pole or the regions within the Antarctic Circle.

A glacial anticyclone believed to overlie Antarctica.

A cold, saline water mass that sinks below the 12,000-foot level in the South Atlantic and flows north from the Antarctic land mass, sometimes reaching latitudes of 45 degrees north; characterized by temperatures around minus four degrees centigrade and salinity of about 34.66 parts per thousand.

The world's largest ocean current which circles the globe and feeds cold water into the Atlantic, Pacific, and Indian Oceans.

1. An ice-covered continent lying mostly within the Antarctic Circle, with the South Pole near its center.
2. The uninhabited continent surrounding the South Pole, consisting of an ice-covered plateau and high mountain peaks with an area of 14,000,000 square kilometers (5,400,000 square miles).

1. When capitalized as Arctic, it means the region that lies around the North Pole, inside the Arctic Circle; usually, regarded as including all areas within the Arctic Circle or all areas north of the tree line which includes the northernmost parts of Alaska, Canada, Scandinavia, and the Soviet Union, as well as Greenland.
2. When spelled as arctic, it refers to being extremely cold or found in, coming from, or associated with this region.

Most compound entries using this term may be spelled either as Arctic or arctic.

An air mass, cold aloft and extending to great heights, whose characteristics develop mostly in winter over arctic surfaces of ice and snow.

A description of areas above the timberline in mountainous northern regions.

A large group of islands in northeastern Canada between the Canadian mainland and Greenland.

In the Northern Hemisphere, the parallel of latitude that is equal to the complement of the summer solstice; due to steady variations in the obliquity of the summer solstice, the position of the Arctic Circle is constantly changing.

The climate of a polar region, kkusually one that istoo cold to allow the growth of trees.

The ill-defined polar convergence zone of the Northern Hemisphere.

An area, especially in the polar regions, having little or no vegetation due to extremely cold temperatures.