apastron

apastron

See also: Apastron

English

WOTD – 15 May 2021

Etymology

A diagram illustrating the apastron between a star (the inner object) and a celestial object orbiting it.

From English apo- (prefix meaning ‘away from, separate’) + Ancient Greek ᾰ̓́στρον (ástron, “fixed star”), modelled after aphelion.[1] Ἄ̆στρον (Ástron) is derived from ᾰ̓στήρ (astḗr, “celestial body (including a star, planet, meteor, etc.)”) (ultimately from Proto-Indo-European *h₂eHs- (“to burn; to glow”)) + -ον (-on, suffix forming nominative, accusative and vocative singular nouns).

Pronunciation

• (Received Pronunciation) IPA^(key): /æˈpæstɹ(ə)n/

• Audio (Southern England)

  (file)

• (General American) IPA^(key): /æˈpæstɹən/, [ə-]
• Hyphenation: ap‧as‧tron

Noun

apastron (plural apastrons or apastra)

1. (astronomy) The point of greatest separation between a celestial object and the star which it orbits.

   Antonym: periastron

Alternative forms

• apoastron

Hypernyms

• apoapsis

Coordinate terms

• aphelion
• apoareion
• apocynthion
• apogalacticon
• apogee
• apohermion
• apojove
• apokrone, apokron
• apolune
• aponigricon
• aposaturnium
• aposelene

 

Translations

point of greatest separation between a celestial object and the star which it orbits

Finnish: apastroni German: Apastron (de) Irish: apastrón m Persian: اپاستار‎ (apāstār) Polish: apastron m Portuguese: apoastro m

References

1. “apastron, n.”, in OED Online ⁠, Oxford, Oxfordshire: Oxford University Press, December 2012; “apastron, n.”, in Lexico, Dictionary.com; Oxford University Press, 2019–2022.

Further reading

• apsis on Wikipedia.Wikipedia

Anagrams

• Pastrano

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Polish

Etymology

From Ancient Greek ἀπό- (apó-) + Ancient Greek ᾰ̓́στρον (ástron).

Pronunciation

• IPA^(key): /aˈpas.trɔn/

• Audio

  (file)

• Rhymes: -astrɔn
• Syllabification: a‧pas‧tron

Noun

apastron m inan

1. (astronomy) apastron

   Antonyms: periastron, peryastron

Declension

Declension of apastron

	singular	plural
nominative	apastron	apastrony
genitive	apastronu	apastronów
dative	apastronowi	apastronom
accusative	apastron	apastrony
instrumental	apastronem	apastronami
locative	apastronie	apastronach
vocative	apastronie	apastrony

Further reading

• apastron in Wielki słownik języka polskiego, Instytut Języka Polskiego PAN
• apastron in Polish dictionaries at PWN