A novel antibiotic is a new type of drug that's designed to kill or inhibit the growth of bacteria in ways that haven't been used before. It's different from existing ones because it might target different parts of the bacteria or have a mechanism that bacteria haven't developed resistance to yet.
A novel antibiotic is a new discovery in the field of medicine. It differs from existing antibiotics as it may have a unique chemical structure or mode of action. This means it can overcome the limitations of current antibiotics and be more potent against tough-to-treat infections.