: a Eurasian herb (Rubia tinctorum of the family Rubiaceae, the madder family) with whorled leaves and small yellowish panicled flowers succeeded by dark berries
broadly: any of several related herbs (genus Rubia)
2
a
: the root of the Eurasian madder used formerly in dyeing
: a Eurasian herb (Rubia tinctorum of the family Rubiaceae, the madder family) with whorled leaves, clusters of small yellowish flowers, and red to black berries
broadly: any of several related herbs (genus Rubia)
2
: the root of the Eurasian madder formerly used in dyeing