Synonyms for Equinoctial circle:

• n.

  •celestial equator (noun)
  • equinoctial line,
  • equator,
  • equators,
  • equinoctial.
  •Other relevant words: (noun)
  • celestial equator,
  • great circle.

• Other synonyms:

  •Other relevant words (noun):
  • orbit,
  • zodiac,
  • longitude,
  • ecliptic,
  • circle,
  • trajectory,
  • apogee,
  • period,
  • vernal equinox,
  • perigee,
  • meridian,
  • equinox.