Final answer:
The misspelled word is "˚ular," which should likely be 'circular.' All major planets orbit nearly within the same plane, but Pluto's orbit is inclined at about 17° to the ecliptic.
Step-by-step explanation:
The misspelled word in the given options is "˚ular." This word appears to be an erroneous version of the word 'circular,' which describes the shape of the common plane that the planets orbit in. Each planetary orbit, including those of the dwarf planets like Pluto and Eris, is nearly circular and confined close to this common plane known as the ecliptic. However, as noted, Pluto's orbit is uniquely inclined about 17° to the ecliptic, distinct from the major planets' orbits, which all lie within 10° of it.