One of the mysteries of the English language finally explained.
1A place where a pig lies; a pigsty.
2Metallurgy. A bed of sand into which molten metal (chiefly iron) is run from a furnace to solidify into pigs.
Early 19th century; earliest use found in William Cobbett (1763–1835), political writer and farmer. From pig + bed.
pig bed/ˈpɪɡ bɛd/
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