nosology

From post-classical Latin nosologia, formed as from Greek νόσος ‘disease’ + -λογία ‘discourse, branch of knowledge’.

nosology (countable and uncountable, plural nosologies)

1. A treatise or written classification of diseases.
2. The study of diseases; the systematic investigation or classification of disease.
3. The characteristics or scientific understanding of a specific disease.
   • 2003: Thomas Arnold [...] constructed a nosology of insanity explicitly on the basis of the Lockean philosophy of mind — Roy Porter, Flesh in the Age of Reason (Penguin 2004, p. 312)