Antonyms of noun apex

1 of 2 senses of apex

Sense 2
apex, solar apex, apex of the sun's way -- (the point on the celestial sphere toward which the sun and solar system appear to be moving relative to the fixed stars)
       Antonym of antapex (Sense 1)
      => antapex -- (the point opposite in direction from the solar apex; the point the solar system is moving away from)

Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun apex

2 senses of apex

Sense 1
vertex, peak, apex, acme -- (the highest point (of something); "at the peak of the pyramid")
       => extreme point, extreme, extremum -- (the point located farthest from the middle of something)

Sense 2
apex, solar apex, apex of the sun's way -- (the point on the celestial sphere toward which the sun and solar system appear to be moving relative to the fixed stars)
       => celestial point -- (a point in the heavens (on the celestial sphere))