apastron
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A diagram illustrating the apastron between a star (the inner object) and a celestial object orbiting it.
See also: Apastron
English
Etymology
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From English apo- (prefix meaning ‘away from, separate’) + Ancient Greek ᾰ̓́στρον (ástron, “fixed star”), modelled after aphelion. 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/,
- Hyphenation: ap‧as‧tron
Noun
apastron (plural apastrons or apastra)
- (astronomy) The point of greatest separation between a celestial object and the star which it orbits.
- Antonym: periastron
Alternative forms
Hypernyms
Coordinate terms
Translations
point of greatest separation between a celestial object and the star which it orbits
References
- ^ “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
Anagrams
Polish
Etymology
From Ancient Greek ἀπό- (apó-) + Ancient Greek ᾰ̓́στρον (ástron).
Pronunciation
Noun
apastron m inan
- (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 Polish dictionaries at PWN