Swal·low·wort n. Bot. (a) See Celandine. (b) A poisonous plant (Vincetoxicum officinale) of the Milkweed family, at one time used in medicine; -- also called white swallowwort.
African swallowwort, a plant of the genus Stapelia.
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Vin·ce·tox·in n. Chem. A glucoside extracted from the root of the white swallowwort (Vincetoxicum officinale, a plant of the Asclepias family) as a bitter yellow amorphous substance; -- called also asclepiadin, and cynanchin.
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