Zo-dĭ'aç-al, a.

a. [Fr. & Sp. zodiacal, It. zodiacale.] Of, or pertaining to, the zodiac; within the zodiac; as, the zodiacal planets.

Zodiacal light (Astron.), a luminous track, of an elongated, triangular figure, lying nearly in the ecliptic, its base being on the horizon, and its apex at varying altitudes. It is to be seen only in the evening, after twilight, and in the morning, before dawn. Its nature is unknown.