bour·don | \ˈbürdᵊn, -ōr-, -ər-\
variants: or less commonly bordun \ˈbȯr- \
plural -s

Definition of bourdon 

2a : a drone bass (as in a bagpipe or a hurdy-gurdy)

b : a pipe-organ stop of a droning or buzzing quality usually of 16-foot pitch

c : the lowest bell (as in a carillon) in a ring of bells

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History and Etymology for bourdon

Middle English burdoun, from Middle French bourdon bass horn, of imitative origin

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