Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A celestial body that is more massive than a gas giant planet but has insufficient mass to sustain the hydrogen fusion reactions that produce radiant energy in normal stars.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun astronomy A
starlike object that contracts to about thevolume of theplanet Jupiter after its formation phase; itsmass may range from several times that of Jupiter, such that itfuses deuterium , up to just below the threshold of sustainedhydrogen fusion.
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