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bit·ter·root | \ ˈbi-tər-ˌrüt 
, ˈbi-tə-, -ˌru̇t \
, ˈbi-tə-, -ˌru̇t \Definition of bitterroot
: a succulent herb (Lewisia rediviva) of the purslane family that grows in western North America and has starchy roots and pink or white flowers
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The first known use of bitterroot was in 1838
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