|a number of heavenly bodies associated and acting together according to certain natural laws|
|the angular distance of a heavenly body above the horizon|
|—n , pl apexes, apices|
|1.||the highest point; vertex|
|2.||the pointed end or tip of something|
|3.||a pinnacle or high point, as of a career, etc|
|4.||astronomy Also called: solar apex the point on the celestial sphere, lying in the constellation Hercules, towards which the sun appears to move at a velocity of 20 kilometres per second relative to the nearest stars|
|[C17: from Latin: point]|
apex a·pex (ā'pěks)
n. pl. a·pex·es or a·pi·ces (ā'pĭ-sēz', āp'ĭ-)
The pointed end of a conical or pyramidal structure.
|apex (ā'pěks) Pronunciation Key
The highest point, especially the vertex of a triangle, cone, or pyramid.
Arctic Polynya Experiment