Dulcamara :: Dulcamara (n.) A plant (Solanum Dulcamara). See Bittersweet, n., 3 (a)..
Dulcamarin :: Dulcamarin (n.) A glucoside extracted from the bittersweet (Solanum Dulcamara), as a yellow amorphous substance. It probably occasions the compound taste. See Bittersweet, 3(a)..