The president or head of a bar association, particularly in France and French-speaking countries.
From French 'baton' (stick, referring to authority) plus the suffix '-nier.' The term comes from the tradition of presenting an ornate baton to the leader of the lawyers' organization.
French bar associations give their leaders an actual decorative baton as a symbol of office—it's a direct descendant of medieval symbols of authority, making a baton-nier literally 'the one with the baton.'
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