WordNet: 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

• domain: topic astronomy, uranology

• hypernym accumulation, aggregation, assemblage, collection

Oort cloud

• (suomi) Oortin pilvi (synonyymi)