Reference meaning
Hubble
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United States astronomer who discovered that (as the universe expands) the speed with which nebulae recede increases with their distance from the observer (1889-1953)
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This definition is reproduced from Princeton WordNet 3.0, sense 11063687-n, under the WordNet 3.0 License. It has not yet received VocabularyBase editorial review. Read the source and license details.