A vocabulary of landscape — a landscape of words 1082 entries

firn

FEERN
Compacted granular snow that has survived at least one summer’s melt cycle without becoming ice. The intermediate stage between fresh snow and glacial ice — dense, rounded crystals bonded together, older than a season but younger than a glacier.
Etymology
German/Swiss German, meaning “of last year.” Related to Old High German firni, old or aged.