名詞 zodiac:

1. a belt-shaped region in the heavens on either side to the ecliptic; divided into 12 constellations or signs for astrological purposes
2. (astrology) a circular diagram representing the 12 zodiacal constellations and showing their signs

1. The zodiac is used in astrology to predict the future.
   十二宮圖用于占星術中預測未來。

zo.di.ac

n.（名詞）

Astronomy A band of the celestial sphere extending about 8= to either side of the ecliptic that represents the path of the principal planets, the moon, and the sun.
【天文學】 黃道帶：天球上，向黃道兩邊各延伸約8度的一條帶，代表主要的行星（月亮和太陽）的軌道
In astrology, this band divided into 2 equal parts called signs, each 30= wide, bearing the name of a constellation for which it was originally named but with which it no longer coincides owing to the precession of the equinoxes.
黃道十二宮圖：在占星學中，被等分為2份的黃道叫作宮，每宮30度，保留著其原有星座的名稱，但由于歲差這些名稱已不相符
A diagram or figure representing the zodiac.
表示黃道的圖形成圖解
A complete circuit; a circle.
圓周；圓

來源：
Middle English
中古英語
from Old French zodiaque
源自 古法語 zodiaque
from Latin zôdiacus
源自 拉丁語 zôdiacus
from Greek zôidiakos (kuklos) [(circle) of the zodiac]
源自 希臘語 zôidiakos (kuklos) [黃道的（一周）]
from zôidion [small represented figure, zodiacal sign] [diminutive of] zôion [living being] * see zoon
源自 zôidion [表示圖解、黃道帶的宮的一小部分] [] zôion的小后綴 [生物] *參見 zoon

【引伸】
zodi.acal