Definition of: swallowwort

(swol′ō·wûrt′) noun
1. A twining perennial herb (Cynanchum vincetoxicum) with greenish–white flowers and roots, the latter formerly used in medicine.
2. The common celandine: said to blossom with the arrival of the swallows and to wither when they depart.
3. One of several plants of the milkweed family.