A broad zone or belt of the heavens, the middle of which is the ecliptic, extending 9° on either side of it. It is divided into twelve signs, each measuring 30° along the ecliptic.
·noun A girdle; a belt. II. Zodiac ·noun A figure representing the signs, symbols, and constellatio...
Webster's Dictionary of the English Language
The emblems of the twelve divisions, into which the ancients divided the zodiac. ...
The Sailor's Word-Book