materies morbi

ma·te·ri·es mor·bi

(mă-tē'rē-ēz mōr'bī),
The substance acting as the immediate cause of a disease.
[L. the matter of disease]

materies morbi

An obsolete term for those factors and substances that cause disease; aetiologic factors; aetiology.

ma·te·ri·es mor·bi

(mă-tē'rē-ēz mōr'bī)
Substance acting as immediate cause of a disease.
[L. the matter of disease]