rəˈpäntik noun
Etymology: New Latin rhaponticum, from rha ponticum pontic rhubarb, from Late Latin rha rhubarb + Latin ponticum, neuter of ponticus pontic — more at rhubarb , pontic
1. archaic : either of two European knapweeds ( Centaurea centaurium and C. rhaponticum )
2. archaic
a. : a rhubarb ( Rheum rhaponticum )
b. : the root of this plant used in pharmacy