noun
a belt or band of the heavens, divided into twelve signs or constellations, through which the sun, moon, and planets pass
adjective
related to the zodiac or astrology
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The zodiac is a circle of twelve 30° divisions of celestial longitude that are centered upon the ecliptic.
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I love reading my horoscope based on my zodiac sign.
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What's your zodiac sign? I'm a Sagittarius.
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The zodiac of personalities at the party was quite diverse.