different between synodic vs sidereal

English

Etymology

Latin synodicus, Ancient Greek ????????? (sunodikós, “of or related to an assembly or meeting”). Equivalent to synod +? -ic.

Pronunciation

• IPA^(key): /s??n?d?k/

Adjective

synodic (not comparable)

1. of, related to or produced by a synod; synodal
   • 1664, Edward Stillingfleet, A Rational Account of the Grounds of Protestant Religion

     a synodical epistle

2. (astronomy) Of or pertaining to the conjunction of two or more heavenly bodies

Translations

English

Alternative forms

• sideral

Etymology

From Latin s?dereus, from s?dus (“star”).

Pronunciation

• (UK) IPA^(key): /sa??d???.i.?l/
• (US) IPA^(key): /sa??d??.i.l?/
• or

Adjective

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.

Derived terms

Related terms

Translations

Anagrams

• realised, resailed, serialed