Plural of cleaning; multiple acts of removing dirt, or the residue and debris removed during cleaning processes.
From 'clean' + the gerund suffix '-ing' + plural '-s.' The plural form allows discussion of repeated or multiple cleaning events.
The residue of cleanings—sweep scrapings, lint, soap film—was so valued in pre-industrial times that 'cleanings waste' was sometimes composted or resold, wasting nothing!
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