Definition of antapex in English:

antapex

(also antiapex)

noun

Astronomy
  • The point on the celestial sphere, situated in the southern constellation Columba, away from which the solar system is moving relative to nearby stars; the point diametrically opposite to the solar apex; more fully "solar antapex". Also: the point on the celestial sphere away from which the earth is moving at any given moment in its orbital motion round the sun.

Origin

Mid 19th century; earliest use found in Reports of the British Association for the Advancement of Science. From anti- + apex.

Pronunciation

antapex

/antˈeɪpɛks/