The term 'Astrologers Dozen' refers to the twelve signs of the ZODIAC, which are Aries, Taurus, Gemini, Cancer, Leo, Virgo, Libra, Scorpio, Sagittarius, Capricorn, Aquarius, and Pisces. These signs are used in astrology to determine a person's character traits, life path, and future. The ZODIAC is an ancient system of astrology that has been used for centuries to help people understand their lives and make decisions.