What properties a compound should have to be called an "ice"? I wonder what compounds are usually called "ice" and what properties do determine it?

I can bring some examples of ice and not.

Not ice:


$\ce{H2S}$
cellulose
sugar
graphite
lithium
solid mercury
polyvinylchloride
solid fats
...


Known as ices:


solid water
solid $\ce{CO2}$
solid nitrogen
solid oxygen
solid methane (?)
solid ethanol (?)


It seems they all have some common properties:


Melting point below room temperature
Transparency
White or blueish color
Chystalline structure (?)
Easy sublimation and high saturation pressure
Low strength and other mechanic properties
Low surface friction (?)


Have I missed anything? What is the accepted definition of ices, say in astronomy or chemistry?
Ice is a term usually given to $\ce{H2O}$ in the solid state. Solid carbon dioxide, what is sometimes called "dry ice" is actually a misnomer — although the gas is frozen, it is not truly ice, in the chemical sense. It is called dry ice because instead of melting into liquid carbon dioxide (like actual ice, which is frozen water to liquid water), dry ice sublimates into it's gaseous state, skipping the liquid phase (almost — still goes through liquid phase, but this happens so fast it's basically negligible) entirely.

As for properties, you basically have all of them listed.