Triplicity

A group of three signs belonging to the same element: fire (Aries, Leo, Sagittarius) earth (Taurus, Virgo, Capricorn), air (Gemini, Libra, Aquarius) and water (Cancer, Scorpio, Pisces). The members of a triplicity lie 120° apart in the zodiac, forming a trigonal and harmonious relationship with each other.