The action (or result of such action) of the freezing of water vapor on a surface (e.g., the ground) that is colder than 32°f (0°c).
A covering of minute ice needles, formed from the atmosphere upon exposed objects that have cooled by radiation below the dew point when that is below the freezing point.
Мороз (погода с отрицательными температурами); изморозь; иней
