The term broad-spectrum antibiotic refers to an antibiotic that acts against a wide range of disease-causing bacteria. A broad-spectrum antibiotic acts against both Gram-positive and Gram-negative bacteria, in contrast to a narrow-spectrum antibiotic, which is effective against specific families of bacteria. An example of a commonly used broad-spe...
An antibiotic having a wide range of activity against both Gram-positive and Gram-negative organisms. ... (05 Mar 2000) ... 
Type: Term Definitions: 1. an antibiotic having a wide range of activity against both gram-positive and gram-negative organisms.
An antibiotic that is effective against a wide range of bacteria, including both gram-positive and gram-negative bacteria. Examples include ampicillin, amoxicillin, ciprofloxacin, and tetracycline.