Of or belonging to the point on the globe of the same longitude but the opposite latitude.
1860, Matthew Fontaine Maury, The Physical Geography of the Sea, chapter XX: “The Winds of the Southern Hemisphere”, § 818;
[T]he westerly winds which prevail on the polar side of 40° S. are stronger and more constant than their antœcian fellows of the north[.]
noun
A person inhabiting to the point on the globe of the same longitude but the opposite latitude.