Bran is the husk of grain, separated in milling. Wheat bran, bran flakes, add bran to the mix.
It is the outer layer, and removing it is what makes flour white and what removes most of the fibre and much of the mineral content. Wholemeal flour keeps it in. It was fed to animals for centuries before anybody thought of eating it deliberately.
1nounbranThe husk of grain, separated in milling.
“She adds a spoonful of bran to her porridge for extra fibre.”
bran is a food.
Old French bran meant bran or filth, probably from a Gaulish word meaning rotten.
Proto-Indo-European
*bʰreHg-
Proto-Celtic
*bragnos — rotten, foul
cel-gau
brennos — rotten
Old French
bren
Middle English
bran
English, today
bran
Built from
From Middle English bran, branne, bren, from Old French bren, bran (“bran, filth”), from cel-gau brennos (“rotten”), from Proto-Celtic bragnos (“rotten, foul”) (compare Welsh braen (“stench”), Irish bréan (“rancid”), wa brin (“excrement”)), from Proto-Indo-European bʰreHg- (compare Latin fragrāre (“to smell strongly”), Dutch brak (“hound”)).
Etymology from Wiktionary, CC BY-SA