Astrologers use the phrase zodiacal order to refer to the standard counter-clockwise order in which the twelve signs of the zodiac are counted, as well as the usual order in which the planets move through the signs.
The concept is derived from the fact that the planets move through the signs of the zodiac in a counter-clockwise order, for example, going from Aries to Taurus to Gemini, and so on, rather than Gemini to Taurus to Aries. The only times when this is not true is when a planet turns retrograde, at which point it begins to move contrary to zodiacal order, which is clockwise.
Clock-wise and counter-clockwise are used here relative to how the signs of the zodiac appear in an astrological chart.
Here is the full list of the order of the signs:
Aries → Taurus → Gemini → Cancer → Leo → Virgo → Libra → Scorpio → Sagittarius → Capricorn → Aquarius → Pisces → (starts over again at Aries)
A circular band in the sky that includes the apparent annual path of the Sun around the earth (called the ecliptic) and a small region on either side of this path. See also Signs.
Zoidion is the original name for a “sign” of the zodiac in Greek.
Zōidion (ζῴδιον) is the singular, meaning “sign”, and zōidia (ζῴδια) is the plural, meaning “signs”.
Robert Schmidt has recently introduced the convention of translating zōidion as “image” in his translations of Hellenistic astrological texts, in order to better convey the original meaning underlying the Greek term.
Most translators simply translate zōidion as “sign”, in keeping with modern astrological conventions.
The English term “sign” is derived from the Latin word “signum”, which itself was used as a translation of zōidion in the Roman period.