Source : Webster's Revised Unabridged Dictionary (1913)

Skirret \Skir"ret\, n. [A corrupted form equivalent to
   sugarwort.] (Bot.)
   An umbelliferous plant ({Sium, or Pimpinella, Sisarum}). It
   is a native of Asia, but has been long cultivated in Europe
   for its edible clustered tuberous roots, which are very
   sweet.

Source : WordNet®

skirret
     n : an Asiatic herb cultivated in Europe for its sweet edible
         tuberous root [syn: {Sium sisarum}]