sidereal day

/saɪˌdɪriəl deɪ/
IPA guide

Other forms: sidereal days

Definitions of sidereal day
  1. noun
    the time for one complete rotation of the earth relative to a particular star, about 4 minutes shorter than a mean solar day
    synonyms: day
    see moresee less
    type of:
    time unit, unit of time
    a unit for measuring time periods
    sidereal time
    measured by the diurnal motion of stars
Cite this entry
Style:
MLA
  • MLA
  • APA
  • Chicago

Copy citation
DISCLAIMER: These example sentences appear in various news sources and books to reflect the usage of the word ‘sidereal day'. Views expressed in the examples do not represent the opinion of Vocabulary.com or its editors. Send us feedback
Word Family