adjective. preventing infection by inhibiting the growth or action of microorganisms.
1. Adjective Those that are bactericidal effect the growth of bacteria by killing them. 2. Noun, singular or mass Ultraviolet germicidal or bactericidal lamps are often used in the medical field to help keep disease under control so it doesn't spread. 3. Verb, base form Disinfectants may be either bactericidal or bacteriostatic. 4. Verb, past participle Some disinfectants may be bactericidal at high concentrations but bacteriostatic at lower concentrations.