We found 8 dictionaries that define the word firn line:

General (3 matching dictionaries)

1. firn line: Merriam-Webster
2. firn line: Collins English Dictionary
3. firn line: TheFreeDictionary.com

Computing (1 matching dictionary)

4. firn line: Encyclopedia

Tech (4 matching dictionaries)

5. Glossary of Meteorology (No longer online)
6. Lake and Water Word Glossary (No longer online)
7. National Weather Service Glossary (No longer online)
8. Firn line: Science In Your Watershed: Hydrologic Definitions

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