From The Collaborative International Dictionary of English v.0.48:

Ultrazodiacal \Ul`tra*zo*di"a*cal\, a. [Pref. ultra- +
   zodiacal.] (Astron.)
   Outside the zodiac; being in that part of the heavens that is
   more than eight degrees from the ecliptic; as, ultrazodiacal
   planets, that is, those planets which in part of their orbits
   go beyond the zodiac.
   [1913 Webster]
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