an antibiotic drug that is active against a range of different bacteria.
an antibiotic which acts on a wide range of types of bacteria
an antibiotic that is effective against a wide range of bacteria. page top
an antibiotic that is effective against a wide range of infectious micro-organisms.
The term broad-spectrum antibiotic refers to an antibiotic with activity against a wide range of disease-causing bacteria. This is in contrast to a narrow-spectrum antibiotic which is effective against only specific families of bacteria. A good example of a commonly used broad-spectrum antibiotic is levofloxacin.