Source : Webster's Revised Unabridged Dictionary (1913)

Hyssop \Hys"sop\, n. [OE. hysope, ysope, OF. ysope, F. hysope,
   hyssope, L. hysopum, hyssopum, hyssopus, Gr. ?, ?, an
   aromatic plant, fr. Heb. [=e]sov.]
   A plant ({Hyssopus officinalis}). The leaves have an aromatic
   smell, and a warm, pungent taste.

   Note: The hyssop of Scripture is supposed to be a species of
         caper ({Capparis spinosa}), but probably the name was
         used for several different plants.

Source : WordNet®

Hyssopus officinalis
     n : a European mint with aromatic and pungent leaves used in
         perfumery and as a seasoning in cookery; often cultivated
         as a remedy for bruises; yields hyssop oil [syn: {hyssop}]