A German bagpipe or similar woodwind drone instrument; a folk musical instrument characteristic of German and Central European traditions.
From German Dudelsack, compound of 'dudel' (to play a bagpipe, from Middle High German dudelen, possibly imitative) and 'Sack' (sack or bag). Related to the English 'dudgeon' (the wood for a bagpipe).
The dudelsack is why the word 'dudgeon' (bagpipe wood) exists in English—German traders and musicians brought both the instrument and its name into English, and we kept the name for the material even after forgetting the instrument!
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