The Collaborative International Dictionary
pegroots
Setterwort \Set"ter*wort`\, n. (Bot.)
The bear's-foot ( Helleborus f[oe]tidus); -- so called
because the root was used in settering, or inserting setons
into the dewlaps of cattle. Called also pegroots.
--Dr.
Prior.
Wiktionary
pegroots
n. A plant, the setterwort.