Definition of flax
1
: any of a genus (Linum of the family Linaceae, the flax family) of herbs
especially
: a slender erect annual (L. usitatissimum) with blue flowers commonly cultivated for its bast fiber and seed
2
: the fiber of the flax plant especially when prepared for spinning
3
: any of several plants resembling flax
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Merriam-Webster unabridged
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Time Traveler for flax
The first known use of flax was before the 12th century
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