The Collaborative International Dictionary of English v.0.48:

Saccharine \Sac"cha*rine\ (? or ?), a. [F. saccharin, fr. L.
   saccharon sugar, Gr. ?, ?, ?, Skr. [,c]arkara. Cf. Sugar.]
   Of or pertaining to sugar; having the qualities of sugar;
   producing sugar; sweet; as, a saccharine taste; saccharine
   matter.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Saccharine \Sac"cha*rine\ (? or ?), n. (Chem.)
   A trade name for benzoic sulphinide. [Written also
   saccharin.]
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Sulphinide \Sul"phi*nide\, n. [Sulpho- + amine + anhydride.]
   (Chem.)
   A white or yellowish crystalline substance,
   C6H4.(SO2.CO).NH, produced artificially by the oxidation of
   a sulphamic derivative of toluene. It is the sweetest
   substance known, having over two hundred times the sweetening
   power of sugar, and is known in commerce under the name of
   saccharine. It has acid properties and forms salts (which
   are inaccurately called saccharinates). --I. Remsen.
   [1913 Webster]

WordNet (r) 3.0 (2006):

saccharine
    adj 1: overly sweet [syn: cloying, saccharine, syrupy,
           treacly]

Moby Thesaurus II by Grady Ward, 1.0:

18 Moby Thesaurus words for "saccharine":
   candied, cloying, deferential, disarming, honeyed, insinuating,
   insinuative, luscious, mawkish, oversweet, rich, sickly-sweet,
   silken, silky, sugared, sugary, sweet, syrupy