The Collaborative International Dictionary of English v.0.48:

Tare \Tare\, n. [Cf. Prov. E. tare brisk, eager, OE. tarefitch
   the wild vetch.]
   1. A weed that grows among wheat and other grain; -- alleged
      by modern naturalists to be the Lolium temulentum, or
      darnel.
      [1913 Webster]

            Didst not thou sow good seed in thy field? From
            whence then hath it tares?            --Matt. xiii.
                                                  27.
      [1913 Webster]

            The "darnel" is said to be the tares of Scripture,
            and is the only deleterious species belonging to the
            whole order.                          --Baird.
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   2. (Bot.) A name of several climbing or diffuse leguminous
      herbs of the genus Vicia; especially, the Vicia
      sativa, sometimes grown for fodder.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Vetch \Vetch\ (v[e^]ch), n. [Also fitch; OE. ficche, feche, for
   veche, OF. veche, vecce, vesche, vesce, F. vesce, fr. L.
   vicia.] (Bot.)
   Any leguminous plant of the genus Vicia, some species of
   which are valuable for fodder. The common species is Vicia
   sativa.
   [1913 Webster]

   Note: The name is also applied to many other leguminous
         plants of different genera; as the chichling vetch, of
         the genus Lathyrus; the horse vetch, of the genus
         Hippocrepis; the kidney vetch (Anthyllis
         vulneraria); the milk vetch, of the genus
         Astragalus; the licorice vetch, or wild licorice
         (Abrus precatorius).
         [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Vicine \Vic"ine\, n. (Chem.)
   An alkaloid extracted from the seeds of the vetch (Vicia
   sativa) as a white crystalline substance.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Vicia sativa
    n 1: herbaceous climbing plant valuable as fodder and for soil-
         building [syn: spring vetch, Vicia sativa]