The straw or fibrous material of which a broom is made, or the plant fiber used to tie brooms together.
From broom + straw (Old English 'streaw', chaff or straw). Describes the material component of brooms.
Broomstraw reveals that early brooms weren't made with horsehair or plastic bristles but with actual plant fibers—traditionally from broom plants or other straw-like plants, making every broom a botanical product.
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