As a noun slud is
(geology) a rapid soil creep, especially referring to downslope soil movement in periglacial areas.
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Wikidiffcom has no English definition. It may be misspelled. slud
English
Noun
(en-noun)
(geology) A rapid soil creep, especially referring to downslope soil movement in periglacial areas.
Synonyms
* (rapid soil creep) sludging, soil flow, soil fluction, solifluction.
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