Lewis Short
phthĭsisco | phthitărus, i (noun M) :
* V. inch. n. [phthisis], to become consumptive or phthisical: phthisiscentibus medicabilis piscina,Sid. Ep. 5, 14.
(† , , m., a false read. for phthir (q. v.), Plin. 32, 11, 53, § 150.)
Charlton T. Lewis, Charles Short, A Latin Dictionary