資料來源 : Webster's Revised Unabridged Dictionary (1913)

Hirudinea \Hir`u*din"e*a\, n. pl. [NL., fr. L. hirudo,
   hirudinis, a leech.] (Zo["o]l.)
   An order of Annelida, including the leeches; -- called also
   {Hirudinei}.