zodiac Definition

zodiac
noun

1. astron.
The band of sky that extends 8° on either side of the Sun's ecliptic, divided into 12 equal parts, each of which once contained one of the zodiacal constellations, though some no longer do.
Form: the zodiac
2. astrol.
A chart or diagram (usually a circular one), representing this band of sky and the signs of the zodiac contained within it.

Derivative: zodiacal
adj

Etymology: 14c: from French zodiaque, from Greek zoidiakos, from zoidion a figure of a small animal.