sideral

Borrowed from Latin sīderālis.

sideral (not comparable)

1. Dated form of sidereal.
   • 1667, John Milton, “(please specify the page number)”, in Paradise Lost. […], London: […] [Samuel Simmons], and are to be sold by Peter Parker […]; [a]nd by Robert Boulter […]; [a]nd Matthias Walker, […], →OCLC; republished as Paradise Lost in Ten Books: […], London: Basil Montagu Pickering […], 1873, →OCLC:

     Like change on sea and land ; sideral blast

• “sideral”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.

• airsled, derails, dialers, earlids, lardies, redials, sadlier

Learned borrowing from Latin sīderālis, from sīdus (“star”).

• Rhymes: (Portugal) -al, (Brazil) -aw
• Hyphenation: si‧de‧ral

sideral m or f (plural siderais)

1. (astronomy) sidereal (of or relating to the stars)

   Synonym: sidéreo

Borrowed from French sidéral, from Latin sideralis.

sideral m or n (feminine singular siderală, masculine plural siderali, feminine and neuter plural siderale)

1. sidereal

From Latin sīderālis, from sīdus (“star”).

• IPA^(key): /sideˈɾal/ [si.ð̞eˈɾal]
• Rhymes: -al
• Syllabification: si‧de‧ral

sideral m or f (masculine and feminine plural siderales)

1. stellar, sidereal

   Synonym: estelar

• “sideral”, in Diccionario de la lengua española (in Spanish), online version 23.7, Royal Spanish Academy, 2023 November 28