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Compare Persian ببول (babul, “a species of mimosa yielding gum arabic”), Sanskrit बब्बुल (babbula), बब्बूल (babbūla, “species of acacia used for tanning”).
Etymology from Wiktionary, CC BY-SA 4.0.
Today it means: The rind of the fruit of several East Indian species of acacia, especially Vachellia nilotica, formerly Acacia arabica; neb-neb. It contains gallic acid and tannin, and is used for dyeing drab. Full definition →