Source : Webster's Revised Unabridged Dictionary (1913)

Hirudo \Hi*ru"do\, n. [L., a leech.] (Zo["o]l.)
   A genus of leeches, including the common medicinal leech. See
   {Leech}.

Source : WordNet®

Hirudo
     n : type genus of the family Hirudinidae [syn: {genus Hirudo}]