planet

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plan·et / ˈplanit/ • n. a celestial body moving in an elliptical orbit around a star. ∎  (the planet) the earth: no generation has the right to pollute the planet. ∎  chiefly Astrol., hist. a celestial body distinguished from the fixed stars by having an apparent motion of its own (including the moon and sun), esp. with reference to its supposed influence on people and events.DERIVATIVES: plan·e·tol·o·gy / ˌplaniˈtäləjē/ n.

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