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polygonaceous

[pol-ee-guh-ney-shuh s, puh-lig-uh-ney-] /ˌpɒl i gəˈneɪ ʃəs, pəˌlɪg əˈneɪ-/
adjective
1.
belonging to the Polygonaceae, the buckwheat family of plants.
Compare buckwheat family.
Origin
1870-1875
1870-75; < Neo-Latin Polygonace(ae) (Polygon(um) the type genus (< Greek polýgonon knotgrass, literally, something with many joints; see poly-, knee, -gon) + -aceae -aceae) + -ous
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for polygonaceous

polygonaceous

/ˌpɒlɪɡəˈneɪʃəs; pəˌlɪɡə-/
adjective
1.
of, relating to, or belonging to the Polygonaceae, a chiefly N temperate family of plants having a sheathing stipule (ocrea) clasping the stem and small inconspicuous flowers: includes dock, sorrel, buckwheat, knotgrass, and rhubarb
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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