apex

n. highest point, climax, uppermost point; lowest part of the root of a tooth (Dentistry)

Apex may refer to:Apex (mollusc), the tip of the spire of the shell of a gastropodApex (headdress), a pointed piece of olive-wood, the base of which was surrounded with a lock of wool, worn by Roman priestsSolar apex, the direction that our solar system travels through in our GalaxyApex (radio band), an experimental very high frequency radio broadcasting systemApex (racing), the point a car should touch on the inside of a turn when following a proper lineApex (geometry), the highest vertex in a polyhedron or geometric solidApex (diacritic) is a sign used by the Romans to mark long vowelsApex (botanical) is the Apical meristem or its remnant on a flowerApex predator
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Apex pl. apexes, a´pices [L.] tip; the pointed end of a conical part; the top of a body, organ, or part. [more]Apex - Community and Resources

Noun
1. the highest point (of something); "at the peak of the pyramid"
(synonym) vertex, peak, acme
(hypernym) extreme point, extreme, extremum
(hyponym) crown
2. the point on the celestial sphere toward which the sun and solar system appear to be moving relative to the fixed stars
(synonym) solar apex, apex of the sun's way
(antonym) antapex
(hypernym) celestial point
(part-holonym) celestial sphere, sphere, empyrean, firmament, heavens, vault of heaven, welkin

n. apex, highest point, climax, uppermost point