Word:

Oort cloud

Noun1.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
accumulation, aggregation, assemblage, astronomy, collection, uranology
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Oop
Oopack
Oophore
Oophorectomy
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Oophoridium
Oophoritis
oophorosalpingectomy
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OOPSLA
OOPSTAD
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Oort
-- Oort cloud --
OOS
OOSA
OOSD
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Oosporangium
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OOT
Ootheca
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ootid
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