ice dwarf

noun3

1. •
   An icy planetoid: an astronomical object, such as Pluto, Sedna or (for some authors) Ceres that is large enough to be a world and contains more ice than a typical asteroid.

   • Farthest from the dim red dwarf Ondeste, the ice dwarf Maisuth has attracted no interest beyond a cursory flyby by automated probe in 1874. No significant resources were noted. — 2010
2. •
   An astronomical object that is larger than the core of a typical comet and icier than a typical asteroid.
3. •
   A centaur or transneptunian object.