antarctic circle

noun, often capitalized A&C

Definition of antarctic circle 

: the parallel of latitude that is approximately 66¹/₂ degrees south of the equator and that circumscribes the southern frigid zone

First Known Use of antarctic circle

1556, in the meaning defined above

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The first known use of antarctic circle was in 1556

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More from Merriam-Webster on antarctic circle

Spanish Central: Translation of antarctic circle

Nglish: Translation of antarctic circle for Spanish Speakers

Britannica.com: Encyclopedia article about antarctic circle

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