A nail with a sharp head, driven into a horseshoe to keep the horse from slipping.

(historical) A lamp placed below the oil tube of an Argand lamp to keep the oil limpid on cold nights; used especially in lighthouses.

Cold so intense as to freeze vegetation and turn it black, without the formation of hoarfrost.

An upwards swelling of soil during freezing conditions caused by an increasing presence of ice as it grows towards the surface, upwards from the depth in the soil where freezing temperatures have penetrated into the soil.

cryophorus

plural of frost-bearer

The depth to which the water present in the soil is expected to freeze in winter. / The depth to which the water present in the soil is actually frozen in a given place at a given point in time.

A painting depicting a winter scene. / (obsolete) Someone (especially a woman) who is emotionally unresponsive.

(meteorology) The condition of air temperature dropping below the freezing point at or near ground level.

A raising of the level of the ground due to the freezing of moist soil