- celandine (sense )
- any of several plants of the milkweed family, as black swallowwort (Cynanchum nigrum), a twining European vine with purplish-brown flowers, now wild in the E U.S.
- See celandine.
- Any of several vines of the genus Cynanchum having clusters of small white or brownish-purple flowers and slender dehiscent pods.
Origin of swallowwortFrom the association of the plant by ancient writers with the return of the swallows in spring ; see celandine. Sense 2, from the forked shape of their pods after dehiscence, resembling a swallow's tail .