sidereal

WOTD – 6 September 2006    

English

Etymology

Latin sidereus, from sidus, sider-, star

Pronunciation

• (UK) IPA: /saɪˈdɪəriəl/, X-SAMPA: /saI"dI@ri@l/
• (US) IPA: /saɪˈdɪɹiəl/, X-SAMPA: /saI"dIri@l/ or IPA: /səˈdɪɹiəl/, X-SAMPA: /s@"dIri@l/

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Adjective

Wikipedia

sidereal (not comparable)

1. Of or relating to the stars.
   • 1919, Hector Macpherson, S.Chapman (series editor), Men of Science: Herschel, Chapter V,

     The field of sidereal astronomy, therefore, was virtually untrodden when, shortly after the beginning of his telescopic work, Herschel began his first review of the heavens.

2. (astronomy) Relating to a measurement of time relative to the position of the stars.
   • 1903, Percival Lowell, The Solar System, Chapter I,

     Then, from a sufficient number of observations of synodic periods to give their mean, we obtain the sidereal period, or period with reference to the stars.

3. (astronomy) Relating to a measurement of time relative to the point of the vernal equinox.

Translations

of or relating to the stars

• Bulgarian: звезден (bg) (zvézden)
• Chinese:

  Mandarin: 星的 (cmn) (xīng de), 恆星的 (cmn), 恒星的 (cmn) (héngxīng de)

• Finnish: tähti- (fi)
• French: sidéral (fr)
• German: siderisch (de), Stern- (de)
• Irish: réaltach (ga)

• Italian: siderale (it) m and f
• Japanese: 星の (ja) (ほしの, hoshi no), 恒星の (ja) (こうせいの, kōsei no)
• Lithuanian: žvaigždinis (lt)
• Russian: звёздный (ru) (zvjózdnyj)
• Spanish: sidéreo (es)
• Welsh: serol (cy)

relating to a measurement of time relative to the position of the stars

• Finnish: sideerinen (fi)
• French: sidéral (fr)
• German: siderisch (de)

• Irish: réaltach (ga)
• Italian: siderale (it) m and f

Derived terms

sidereal astrology sidereal clock sidereal day sidereal hour sidereal month

sidereal noon sidereal period sidereal table sidereal time sidereal year

Anagrams

• realised