Final answer:
Antiseptics are substances that discourage the growth or action of microorganisms on living tissues. They are commonly used in healthcare settings to disinfect wounds and prevent infections.
Step-by-step explanation:
The name of a substance that discourages the growth or action of microorganisms is antiseptic. Antiseptics are chemicals used to control microbial growth on living tissues. They are commonly used in healthcare settings to disinfect wounds and prevent infections. Examples of antiseptics include hydrogen peroxide, rubbing alcohol, and iodine.