The Collaborative International Dictionary of English v.0.48:
Hirudo \Hi*ru"do\, n. [L., a leech.] (Zool.) A genus of leeches, including the common medicinal leech. See Leech. [1913 Webster]WordNet (r) 3.0 (2006):
Hirudo n 1: type genus of the family Hirudinidae [syn: Hirudo, genus Hirudo]