Lilacin \Lil"a*cin\ (l[i^]l"[.a]*s[i^]n), n. (Chem.) See {Syringin}. [1913 Webster]
Syringin \Sy*rin"gin\, n. (Chem.) A glucoside found in the bark of the lilac ({Syringa}) and extracted as a white crystalline substance; -- formerly called also {lilacin}. [1913 Webster]