oort cloud
English Thesaurus
1. (astronomy) a hypothetical huge collection of comets orbiting the sun far beyond the orbit of Pluto; perturbations (as by other stars) can upset a comet's orbit and may send it tumbling toward the sun (noun.group)
hypernym | : | accumulation, aggregation, assemblage, collection, |
definition | : | several things grouped together or considered as a whole (noun.group) |
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