Zodiac
Defined by Merriam-Webster;
a
: an imaginary band in the heavens centered on the ECLIPTIC that encompasses the apparent paths of all the planets and is divided into 12 constellations or signs each taken for astrological purposes to extend 30 degrees of longitude
b
: a figure representing the signs of the zodiac and their symbols
2
: a cyclic course
… a zodiac of feasts and fasts …
—Ralph Waldo Emerson
“Derived from the Greek zoidiakos kyklos, meaning "circle of animals," it refers to the 12 constellations, most of which are represented by animals or figures”.
“The zodiac is an imaginary belt in the heavens, extending roughly 8 degrees north or south of the ECLIPTIC, representing the path the Sun, Moon, and principal planets appear to travel over a year. It is divided into 12 equal, 30 degree segments, known as signs, which roughly correspond to twelve constellations”.
“Astronomical Belt; While based on astronomy, the zodiac's 12-sign system used in astrology differs slightly from the actual astronomical constellations due to the precession of the equinoxes”.
With all these words relating to the Zodiac investigated through their definitions points to the one and only true Astrology is indeed Tropical. May we all stay inquisitive to search and find truth.