Zodiac \ ˈzō-dē-ˌak \ (noun)
– 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.
– a cyclic course
Use in a sentence:
The Chinese Zodiac is based on a 12-year cycle that relates each year to an animal sign and its reputed attributes. 2012 is year of the Water Dragon.