Cuivret (m)
(with) definite article: letube of a double-reed, around which the 2 reed blades are fastened
From "cuivre" [copper (material)]; NB: According to Lutgerink, oddly, "a synonym of Canon".
Airs du temps: cornemuses du monde, musiques des régions. Ploezal, 1996, p.39.
Lutgerink, Marius: L'art de faire des anches de cabrette en toute confiance. In: Ricros (et al.): La cabrette… (2017), p.615.