From Lexicanum

Ice world is the term given to perpetually cold planets covered in glaciers and snow and located so far from their sun that they are locked in a permanent ice age. "Ice world" is not a technical planet classification, but a general term referring to its natural environment.

Notable ice worlds

• Valhalla
• Lorn V
• Chosin
• Tarsis Ultra (classed as an Agri World)

Worlds of the Galaxy

Imperium	Adeptus Astartes Homeworld • Agri World • Cardinal World • Civilised World • Dead World • Death World • Desert World • Feral World • Feudal World • Forge World • Hive World • Ice World • Industrial World • Jungle World • Knight World • Mining World • Ocean World • Paradise World • Penal World • Research Station • Shrine World
Xeno	Xenos World • Daemon World • Exodite World • Tomb World • Maiden World • Crone World • Ork World • Tau Empire • Craftworld