from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A large planet having a thick gaseous atmosphere but no solid surface due to a low abundance of rock or other solid material. Jupiter, Saturn, Uranus, and Neptune are gas giants.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun A large
planetcomposed mostly of gaseous hydrogenand helium, along with methaneand ammonia; possibly with a solid core.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun any of the four outermost planets in the solar system; much larger than Earth and gaseous in nature (like Jupiter)
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