ice dwarf

Noun

 * 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.
 * 2)  A centaur or transneptunian object.
 * 3)  An astronomical object that is larger than the core of a typical comet and icier than a typical asteroid.
 * 1)  An astronomical object that is larger than the core of a typical comet and icier than a typical asteroid.