Rutin \Ru"tin\ (r[udd]"t[i^]n), n. (Chem.)
A glucoside resembling, but distinct from, quercitrin. Rutin
is found in the leaves of the rue ({Ruta graveolens}) and
other plants, and obtained as a bitter yellow crystalline
substance which yields quercitin on decomposition.
[1913 Webster]