from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A planet whose mean distance from the sun is greater than that of Earth's.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A planet that orbits the Sun beyond the orbit of the Earth and thus shows retrograde motion when viewed from the Earth
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. any of the planets whose orbit lies outside the earth's orbit
Sorry, no etymologies found.