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apex (astronomy)

Definition:

the point on the celestial sphere toward which the sun and solar system appear to be moving relative to the fixed stars

Class:

location noun (spatial position)

Related to:

apical

Plurals:

apexes | apices

Original source:

Princeton WordNet

Etymology:

Latin apex "summit, peak, tip, top, extreme end"; probably related to apere "to...
(Source: Online Etymology)  [more]

All senses of apex...

Definition references  (+images)

Wikipedia:

Solar apex | Apex of the Sun's Way

the direction that the Sun travels with respect to the Local Standard of Rest. In lay terms, it's the "target" within the Milky Way that the Sun appears to be "chasing" as it orbits the galaxy. It should not be confused with the Sun's "motion" through... (46 of 434 words, 5 images)

en​.wikipedia​.org​/wiki​/Solar apex

Collins Dictionary:

apex | APEX | solar apex [synonym, sense-specific] | vertex [synonym, sense-specific]

the highest point; vertex | the pointed end or tip of something | a pinnacle or high point, as of a career, etc | [astronomy] the point on the ... (26 of 603 words, 6 definitions, 9 usage examples, pronunciations)

www​.collinsdictionary​.com​/dictionary​/english​/apex

Random House Dictionary:

solar apex [astronomy]

the point on the celestial sphere, near Vega, toward which the solar system is moving relative to the visible stars. (20 of 23 words)

dictionary​.infoplease​.com​/solar-apex

Wiktionary:

solar apex [astronomy] | solar apexes [plural] | solar apices [plural]

The point to which the Sun appears to be moving with respect to the local stars (16 of 18 words)

en​.wiktionary​.org​/wiki​/solar apex

Oxford Dictionary:

apex | apexes [plural] | apices [plural]

the top or highest part of something, especially one forming a point | [geometry] : the highest point in a plane or solid figure, relative to a base ... (27 of 179 words, 7 definitions, 5 usage examples, pronunciations)

oxforddictionaries​.com​/definition​/english​/apex

Merriam-Webster:

apex | apexes [plural] | apices [plural] | tip [synonym, sense-specific] | vertex [synonym, sense-specific] | acme [synonym, sense-specific] | height [synonym, sense-specific] | apogee [synonym, sense-specific] | capstone [synonym, sense-specific] | ...

the uppermost point; "vertex" ; the narrowed or pointed end; "tip" | the highest or culminating point (16 of 154 words, 2 definitions, 5 usage examples, pronunciations)

www​.merriam-webster​.com​/dictionary​/apex

American Heritage Dictionary:

apex | apexes [plural] | apices [plural]

The highest point; the vertex | The point of culmination. | The usually pointed end of an object; the tip (18 of 48 words, 3 definitions, 2 usage examples, pronunciations)

www​.yourdictionary​.com​/apex

Macmillan British Dictionary:

apex [singular, formal]

the top or highest part of something that ends in a point | the most important or successful part of something (20 of 48 words, 2 definitions, 1 usage example, pronunciation)

www​.macmillandictionary​.com​/dictionary​/british​/apex

New World Dictionary:

apex | apexes [plural] | apices [plural]

the highest point; peak; vertex | the pointed end; tip | the highest point of interest, excitement, etc.; climax | [United States, mining] the edge or ... (23 of 48 words, 4 definitions, pronunciations)

www​.yourdictionary​.com​/apex

Cambridge Dictionary:

apex [entry 1] | apexes [plural] | apices [plural] | apical [adjective, derived]

[specialized] the highest point or top of a shape or object | [figurative] the highest point or most successful part of something (21 of 47 words, 2 definitions, 2 usage examples, pronunciations)

dictionary​.cambridge​.org​/dictionary​/british​/apex 1

Britannica Encyclopedia:

celestial sphere [astronomy]

the apparent surface of the heavens, on which the stars seem to be fixed. For the purpose of establishing coordinate systems to mark the positions of ... (26 of 86 words, 3 images)

www​.britannica​.com​/E​Bchecked​/topic​/101326​/celestial-sphere

Columbia Encyclopedia:

celestial sphere | celestial spheres

imaginary sphere of infinite radius with the earth at its center. It's used for describing the positions and motions of stars and other objects. For ... (25 of 103 words)

www​.infoplease​.com​/ce​6​/sci​/A​0811034​.html

Encarta Dictionary:

solar apex

the point in space toward which the Sun appears to be moving, located in the constellation Hercules (17 of 28 words)

encarta​.msn​.com​/dictionary 1861710018​/definition​.html  [offline]

Etymology references

Online Etymology:

apex

First use: about 1600

Origin: Latin apex "summit, peak, tip, top, extreme end"; probably related to apere "to fasten, fix", hence "the tip of anything" (one of the ... (25 of 48 etymology words)

www​.etymonline​.com​/index​.php term=apex

New World Dictionary:

apex | apexes [plural] | apices [plural]

Origin: Latin, a point; probably from apere, to fasten: see "apt"

www​.yourdictionary​.com​/apex

Oxford Dictionary:

apex | apexes [plural] | apices [plural]

First use: early 17th century

Origin: Latin, "peak, tip"

oxforddictionaries​.com​/definition​/english​/apex

Apex

First use: 1970s

Origin: Advance Purchase Excursion

oxforddictionaries​.com​/definition​/english​/Apex

Collins Dictionary:

apex | APEX

First use: 17th century

Origin: from Latin: point

www​.collinsdictionary​.com​/dictionary​/english​/apex

Wiktionary:

apex | apices [plural] | apexes [plural]

Origin: Latin apex ("point, tip, summit").

en​.wiktionary​.org​/wiki​/apex

Merriam-Webster:

apex | apexes [plural] | apices [plural]

First use: 1601

Origin: Latin

www​.merriam-webster​.com​/dictionary​/apex

American Heritage Dictionary:

apex | apexes [plural] | apices [plural]

Origin: Latin.

www​.yourdictionary​.com​/apex

Encarta Dictionary:

apex | Latins [plural]

First use: Pre-12th century

Origin: Latin Latinus "of the people of Latium, Roman" from Latium, ancient region in Italy

encarta​.msn​.com​/dictionary 1861586180​/definition​.html  [offline]

Apex

Origin: Acronym from advance-purchase excursion

encarta​.msn​.com​/dictionary 1861586181​/definition​.html  [offline]

Audio references

Collins Dictionary:

apex | APEX

Audio: North American English pronunciation of "apex"

www​.collinsdictionary​.com​/dictionary​/english​/apex

Macmillan British Dictionary:

apex [singular, formal]

Audio: British English pronunciation of "apex"

www​.macmillandictionary​.com​/dictionary​/british​/apex

Apex [countable, tourism, British] | Apexes [plural]

Audio: British English pronunciation of "Apex"

www​.macmillandictionary​.com​/dictionary​/british​/Apex

Macmillan American Dictionary:

apex [singular, formal]

Audio: North American pronunciation of "apex"

www​.macmillandictionary​.com​/dictionary​/american​/apex

Cambridge Dictionary:

apex [entry 1] | apexes [plural] | apices [plural]

Audio 1: British English pronunuciation of "apex"

Audio 2: North American English pronunuciation of "apex"

dictionary​.cambridge​.org​/dictionary​/british​/apex 1

the Free Dictionary:

apex

Audio 1: North American English pronunciation of "apex"

Audio 2: British English pronunciation of "apex"

Audio 3: North American English pronunciation of "apex" by speech synthesizer

www​.thefreedictionary​.com​/apex

Google Dictionary:

apex | apices [plural] | apexes [plural] | apexed [past tense] | apexing [present participle]

Audio: English pronunciation of "apex"

www​.google​.com​/#hl=en&tbs=dfn​:1&fp=1&q=apex

Merriam-Webster Pronunciation:

apex

Audio: North American pronunciation of "apex"

www​.merriam-webster​.com​/audio​.php file=apex​0001 word=apex

YourDictionary Audio:

apex

Audio: North American English pronunciation of "apex" by speech synthesizer

www​.yourdictionary​.com​/apex

Page last updated: 2013-06-26

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