Meanings
plural apastrons · plural apastra · alternative apoastron
- astronomyThe point of greatest separation between a celestial object and the star which it orbits.
Antonyms: periastron
Synonyms & antonyms
nounThe point of greatest separation between a celestial object and the star which it orbits.
Origin
- Proto-Indo-European*h₂eHs-“to burn; to glow”
- Ancient Greekᾰ̓́στρον“fixed star”
- Englishapastron
From English ap- (prefix meaning ‘away from, separate’) + Ancient Greek ᾰ̓́στρον (ắstron, “fixed star”), modelled after aphelion. Ἄ̆στρον (Á̆stron) is derived from ᾰ̓στήρ (ăstḗr, “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).
More words from Ancient Greek, Proto-Indo-European
Full word history & related roots →Translations
Bulgarian апастрий
- апастрий (apastrij)point of greatest separation between a celestial object and the star which it orbits
Finnish apastroni
- apastronipoint of greatest separation between a celestial object and the star which it orbits
German Apastron
- Apastronpoint of greatest separation between a celestial object and the star which it orbits
Irish apastrón
- apastrónpoint of greatest separation between a celestial object and the star which it orbits
Persian اپاستار
- اپاستار (apâstâr)point of greatest separation between a celestial object and the star which it orbits
Polish apastron
- apastronpoint of greatest separation between a celestial object and the star which it orbits
Portuguese apoastro
- apoastropoint of greatest separation between a celestial object and the star which it orbits
Slovak apoastrón
- apoastrónpoint of greatest separation between a celestial object and the star which it orbits
Rhymes & wordplay
Anagrams
Cite this entry
apastron. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/apastron
“apastron.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/apastron. Accessed November 3, 2026.
WatkinsX Dictionary, s.v. “apastron,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/apastron.
Source: apastron on Wiktionary, CC BY-SA 4.0.