Wiktionary
n. (context chemistry English) A saturated hydrocarbon variant of adamantane, its structure resembling a cage formed by three fused boat cyclohexanes.
Wikipedia
Iceane is a saturated polycyclic hydrocarbon with formula CH. It has a cage-like molecular structure, whose carbon skeleton can be viewed as three fused cyclohexane rings in the boat conformation; or as two such rings in the chair conformation, connected by three parallel (axial) bonds.
The name "iceane" was proposed by the chemist Louis Fieser about a decade before the compound was first prepared. He was carrying out studies on the arrangement of water molecules in ice, when it occurred to him that there could exist a stable hydrocarbon with the above structure.
It is also referred to as wurtzitane, due to its similarity to the wurtzite crystal structure; however, the name "iceane" has precedence.