The Collaborative International Dictionary of English v.0.48:

Parsley \Pars"ley\ (p[aum]rs"l[y^]), n. [OE. persely, persil, F.
   persil, L. petroselinum rock parsley, Gr. petrose`linon;
   pe`tros stone + se`linon parsley. Cf. Celery.] (Bot.)
   An aromatic umbelliferous herb (Carum Petroselinum), having
   finely divided leaves which are used in cookery and as a
   garnish.
   [1913 Webster]

         As she went to the garden for parsley, to stuff a
         rabbit.                                  --Shak.
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   Fool's parsley. See under Fool.

   Hedge parsley, Milk parsley, Stone parsley, names given
      to various weeds of similar appearance to the parsley.

   Parsley fern (Bot.), a small fern with leaves resembling
      parsley (Cryptogramme crispa).

   Parsley piert (Bot.), a small herb (Alchemilla arvensis)
      formerly used as a remedy for calculus.
      [1913 Webster]