subantarctic

adjective
sub·​ant·​arc·​tic | \ˌsəb-ant-ˈärk-tik, -ˈär-tik\

Definition of subantarctic 

: of, relating to, characteristic of, or being a region just outside the antarctic circle

First Known Use of subantarctic

1851, in the meaning defined above

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The first known use of subantarctic was in 1851

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