MedicalTerminology DB

Meaning of MS 209: A substance that is being studied for its ability to make cancer cells respond better to chemotherapy drugs to which they have become resistant.

Definition of MS 209

A substance that is being studied for its ability to make cancer cells respond better to chemotherapy drugs to which they have become resistant. It is a type of quinolone antibiotic.

Written and maintained by James Murray Last updated July 21, 2026 Educational reference, not medical advice. Read the limitations.

For learning, not diagnosis. This glossary provides general educational information and is not a substitute for advice from a qualified healthcare professional. If you may be experiencing a medical emergency, contact local emergency services.