Plato on Snow

[Winter is here: We've had a fair bit this year]

[59e] ... when it is thus solidified, the part of it above the earth which is most affected by this process is termed “hail,” and the part upon the earth “ice” and the part which is less affected and is still only half-solid is called snow when it is above the earth, but when it is upon the earth and solidified out of dew it is called “hoar-frost.”

Plato, Timaeus.