[zoh-dee-ak] 
| 1. | an imaginary belt of the heavens, extending about 8° on each side of the ecliptic, within which are the apparent paths of the sun, moon, and principal planets. It contains twelve constellations and hence twelve divisions called signs of the zodiac. Each division, however, because of the precession of the equinoxes, now contains the constellation west of the one from which it took its name. Compare sign of the zodiac. |
| 2. | a circular or elliptical diagram representing this belt, and usually containing pictures of the animals, human figures, etc., that are associated with the constellations and signs. |
| 3. | a circuit or round. |
idi(on) animal sign (zô(ion) animal + -idion dim. suffix) + -akos -ac 
[zoh-dahy-uh-kuhl] , adjective | zo·di·ac (zō'dē-āk') n.
[Middle English, from Old French zodiaque, from Latin zōdiacus, from Greek zōidiakos (kuklos), (circle) of the zodiac, from zōidion, small represented figure, zodiacal sign, diminutive of zōion, living being; see zoon1.] zo·di'a·cal (-dī'ə-kəl) adj. |
A band of the sky along which the sun, the moon, and most of the planets move. It is divided into twelve parts, with each part named for a nearby constellation.
Note: The twelve constellations, or signs, of the zodiac are important in astrology.
The imaginary band in the sky through which the sun, the moon, and the planets appear to move. The twelve constellations in the band (Aquarius, Pisces, and so on) are the familiar signs of the zodiac used in astrology.
