first quarter

/fərst ˌkwɔrdər/
/fəst ˈkwɔtə/
IPA guide

Other forms: first quarters

Definitions of first quarter
  1. noun
    the first fourth of the Moon's period of revolution around the Earth
    see moresee less
    type of:
    half-moon
    the time at which the Moon is at first or last quarter when half its face is illuminated
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