sidus

Esperanto

Verb

sidus

1. conditional of sidi

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Gothic

Romanization

sidus

1. Romanization of 𐍃𐌹𐌳𐌿𐍃

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Ido

Verb

sidus

1. conditional of sidar

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Latin

Etymology

Compare Ancient Greek σίδηρος (sídēros). Some derive this from Proto-Indo-European *sweid- (“sweat”), whence Latin sūdor, Ancient Greek ἱδρώς (hidrṓs), English sweat; however there are phonetic problems, most notably the initial /s/ in Greek instead of expected */h/. The origin of both the Latin and Greek words is unknown, but likely substrate and related to Pre-Greek.

Pronunciation

• (Classical) IPA^(key): /ˈsiː.dus/, [ˈs̠iːd̪ʊs̠]
• (Ecclesiastical) IPA^(key): /ˈsi.dus/, [ˈsiːd̪us]

Noun

sīdus n (genitive sīderis); third declension

1. group of stars, constellation, asterism
   • 8 CE, Ovid, Fasti 1.457-458:

     Intereā Delphīn clārum super aequora sīdus tollitur

     Meanwhile the Dolphin, a bright constellation, is being risen over the surface of the sea

2. a star

   Synonyms: astēr, astrum, stēlla

3. (poetic) the night sky
4. (figuratively) a season (of the year)

Declension

Third-declension noun (neuter, imparisyllabic non-i-stem).

Case	Singular	Plural
Nominative	sīdus	sīdera
Genitive	sīderis	sīderum
Dative	sīderī	sīderibus
Accusative	sīdus	sīdera
Ablative	sīdere	sīderibus
Vocative	sīdus	sīdera

Derived terms

• cōnsīderō
• dēsīderō
• sīderālis
• sīdereus
• sīderor

See also

• stella
• astrum

References

• “sidus”, in Charlton T[homas] Lewis; Charles [Lancaster] Short (1879) […] A New Latin Dictionary […], New York, N.Y.; Cincinnati, Ohio; Chicago, Ill.: American Book Company; Oxford: Clarendon Press.
• “sidus”, in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
• sidus in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette
• Carl Meißner; Henry William Auden (1894) Latin Phrase-Book‎^[1], London: Macmillan and Co.
  • a star-light night: nox sideribus illustris
    
  • the fixed stars: sidera certis locis infixa
    
  • astronomy: astrologia (pure Latin sidera, caelestia)
    
  • an astronomer: spectator siderum, rerum caelestium or astrologus
    
• “sidus”, in Harry Thurston Peck, editor (1898) Harper's Dictionary of Classical Antiquities, New York: Harper & Brothers
• “sidus”, in William Smith, editor (1854, 1857) A Dictionary of Greek and Roman Geography, volume 1 & 2, London: Walton and Maberly