Definition of phthisiology in US English:

phthisiology

noun

Medicine
rare
  • The scientific study of tuberculosis; a branch of medicine dealing with tuberculosis.

Origin

Mid 19th century (in an earlier sense). In sense 1 from post-classical Latin phthisiologia, perhaps via French phtisiologie or German Phthisiologie.

Pronunciation

phthisiology

/ˌ(f)θɪzɪˈɒlədʒi/