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Webster 1913 Edition
Polygonaceous
Polˊy-go-na′ceous
,Adj.
[See
Polygonum
.] (Bot.)
Of or pertaining to a natural order of apetalous plants (
Polygonaceæ
), 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.