\Zo*di"a*cal\, a. [Cf. F. zodiacal.] (Astron.)
Of or pertaining to the zodiac; situated within the zodiac;
as, the zodiacal planets.
{Zodiacal light}, a luminous tract of the sky, of an
   elongated, triangular figure, lying near 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. It is supposed
   to be due to sunlight reflected from multitudes of
   meteoroids revolving about the sun nearly in the plane of
   the ecliptic.