/pol'ee geuh nay"sheuhs, peuh lig'euh nay"-/ , adj.
belonging to the Polygonaceae, the buckwheat family of plants. Cf. buckwheat family .
[ 1870-75; Polygonace ( ae ) ( Polygon ( um ) the type genus ( polýgonon knotgrass, lit., something with many joints; see POLY-, KNEE, -GON) + -aceae -ACEAE) + -OUS ]