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The symbol for the element lutetium.
The symbol for lutetium.
((Chinese lu: "law"), ancient Chinese musical instruments constructed for tuning purposes. To establish pitches, 12 bamboo pipes, closed at one end, were cut into graduated lengths. When blown across their open ends, they produced the 12 lu, or fundamental pitches, of the octave. These pipes should not be confused with the panpipe, or paixiao.