Oort cloud

play
noun \ˈȯrt-\

Definition of Oort cloud

  1. :  a spherical shell of cometary bodies believed to surround the sun far beyond the orbits of the outermost planets and from which some are dislodged when perturbed to fall toward the sun — compare kuiper belt

Origin and Etymology of oort cloud

Jan Oort †1992 Dutch astronomer


First Known Use: 1974



Seen and Heard

What made you want to look up Oort cloud? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

acid in temper, mood, or tone

Get Word of the Day daily email!

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!