trans-Neptunian object[trănsˌnĕp-to͞oˈnē-ən, -tyo͞oˈ-, trănzˌ]
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
noun Abbr. DRM
A celestial object that orbits the sun at a greater distance on average than Neptune.