sidus

Esperanto

Verb

sidus

1. conditional of sidi

Gothic

Romanization

sidus

1. Romanization of 𐍃𐌹𐌳𐌿𐍃

Ido

Verb

sidus

1. conditional of sidar

Latin

Etymology

Compare Ancient Greek σίδηρος (sídēros, “iron”). Some derive this from Proto-Indo-European *sweyd- (“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]
• (modern Italianate 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. Lewis and Charles Short (1879) A Latin Dictionary, 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