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A ball of moss, often surrounding a rock, that moves across a glacier.
Definition source: English Wiktionary via Wiktextract
Usage: plural-normally
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
Calque of Icelandic jökla-mýs. Coined by geologist Jón Eythórsson in 1950. The Icelandic term appears only in plural form.