materia medica
noun
ma·te·ria med·i·ca mə-ˈtir-ē-ə-ˈme-di-kə 
1
: substances used in the composition of medical remedies : drugs, medicine
2
a
: a branch of medical science that deals with the sources, nature, properties, and preparation of drugs
b
: a treatise on materia medica
Word History
Etymology
New Latin, literally, medical matter
First Known Use
1663, in the meaning defined at sense 1
Medical Definition
materia medica
noun
ma·te·ria med·i·ca mə-ˌtir-ē-ə-ˈmed-i-kə
1
: substances used in the composition of medical remedies : drugs, medicine
2
a
: a branch of medical science that deals with the sources, nature, properties, and preparation of drugs
b
: a treatise on materia medica