Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun oort_cloud

1 sense of oort cloud

Sense 1
Oort cloud -- ((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)
       => collection, aggregation, accumulation, assemblage -- (several things grouped together or considered as a whole)