A person or device that works with bran, or who mills, processes, or deals in grain bran.
From 'bran' plus the agent suffix '-er,' creating a term for someone whose occupation involves bran processing or trading.
In grain-producing regions of medieval and early modern Europe, the branner was an important intermediary figure—they sold the rejected bran to poor families, who used it for porridge and medicine, making them economically essential despite low status.
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