Sidereal time
/saɪˈdɪə.riəl taɪm/ noun
noun ·Rare ·Advanced level
Definitions
Noun
- 1 Time measured by the apparent diurnal motion of the vernal equinox; approximated by that based on the rotation of planet Earth relative to the seemingly fixed stars. uncountable
- 2 measured by the diurnal motion of stars wordnet