a major tectonic division of the earth’s crust, comprising Antarctica and adjacent ocean basins (the South Indian, Southeast Pacific, and Atlantic-Indian basins) and bounded on the north by the Nazca, South American, African, Indo-Australian, and Pacific plates.
- Antarctic zone
the section of the earth’s surface lying between the Antarctic Circle and the South Pole.
relieving or preventing asthma or an paroxysm. an antasthmatic agent.
preventing or curing atrophy. an antatrophic agent.