Plural of capping; multiple caps or finishing layers, or the materials trimmed away when putting caps on things.
From capping plus the plural suffix -s, creating the plural noun for multiple instances or pieces of capping.
In beekeeping, cappings are the wax seals that bees put on honeycomb cells, and beekeepers carefully collect them because they're pure beeswax worth real money for cosmetics and candles!
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