Etymology

flour

F4L1O1U1R1

Today it means: Powder obtained by grinding or milling cereal grains, especially wheat, or other foodstuffs such as soybeans and potatoes, and used to bake bread, cakes, and pastry. Full definition →

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The story

Spelled (until about 1830) and meaning flower in the sense of flour being the "finest portion of ground grain" (compare French fleur de farine, fine fleur). Doublet of fleur, flor, and flower. Partially displaced native meal. The U.S. standard of identity comes from 21CFR137.105.

Etymology from Wiktionary, CC BY-SA 4.0.