sidereus

Latin

Etymology

sīdus (“a star”, “a constellation”, stem: sīder-) +‎ -eus (suffix forming adjectives from nouns)

Pronunciation

• (Classical Latin) IPA^(key): /siːˈde.re.us/, [s̠iːˈd̪ɛreʊs̠]
• (modern Italianate Ecclesiastical) IPA^(key): /siˈde.re.us/, [siˈd̪ɛːreus]

Adjective

sīdereus (feminine sīderea, neuter sīdereum); first/second-declension adjective

1. of, pertaining to, or consisting of a stellar object or objects
   1. of or belonging to the stars
      1. full of stars, starry
   2. of or belonging to the stellar constellations
   3. of or belonging to the Sun
2. (transferred senses):
   1. like a star or the stars in terms of beauty, brightness, brilliance, magnitude, majesty, etc.
   2. (in general) bright, glittering, shining, excellent, shiny, sparkling
   3. (poetic, especially of heroes or the gods) heavenly, divine, brilliant

Declension

First/second-declension adjective.

Number	Singular				Plural
Case / Gender	Masculine	Feminine	Neuter		Masculine	Feminine	Neuter
Nominative	sīdereus	sīderea	sīdereum		sīdereī	sīdereae	sīderea
Genitive	sīdereī	sīdereae	sīdereī		sīdereōrum	sīdereārum	sīdereōrum
Dative	sīdereō		sīdereō		sīdereīs
Accusative	sīdereum	sīdeream	sīdereum		sīdereōs	sīdereās	sīderea
Ablative	sīdereō	sīdereā	sīdereō		sīdereīs
Vocative	sīderee	sīderea	sīdereum		sīdereī	sīdereae	sīderea

Descendants

• Catalan: sideri
• English: sidereal
• Italian: sidereo
• Portuguese: sidéreo
• Spanish: sidéreo

References

• “sīdĕrĕus”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
• “sidereus”, in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
• sīdĕrĕus in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette, page 1,438.
• “sīdereus” on page 1,756/2 of the Oxford Latin Dictionary (1st ed., 1968–82)