frost line

Meaning

Noun

• 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.
• In a solar system, the distance from the protosun beyond which hydrogen-containing gas compounds freeze.

Related

Similar words

• frost depth, freezing depth
• frost front
• snow line, ice line