Lewis Short
hĭrūdo (noun F) : (also called sanguisūga)
* A leech, blood-sucker, Plin. 32, 10, 42, § 122: ego me convortam in hirudinem atque exsugebo sanguinem,Plaut. Ep. 2, 2, 4.—Fig., of any thing that exhausts, etc.: aerarii,Cic. Att. 1, 16, 11: non missura cutem, nisi plena cruoris, hirudo,Hor. A. P. 476.
Charlton T. Lewis, Charles Short, A Latin Dictionary