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Polygonaceous is a 13 letter word which starts with the letter P and ends with the letter S for which we found 1 definitions.

(a.) Of or pertaining to a natural order of apetalous plants (Polygonaceae) of which the knotweeds (species of Polygonum) are the type and which includes also the docks (Rumex) the buckwheat rhubarb sea grape (Coccoloba) and several other genera.
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