germ-killer
nounUK /ˈdʒɜːmˌkɪlə/
US /ˈdʒɜːrmˌkɪlər/
A germ-killer is something that kills tiny bugs that make you sick.
Mom used a germ-killer to clean the kitchen counter.
OTHER MEANINGS
2. A substance that destroys harmful microorganisms on surfaces.
The hospital uses a strong germ-killer on the floors.
3. A product added to water or air to make it safe.
They put a germ-killer in the pool to keep it clean.
4. A person or thing that stops the spread of disease.
Handwashing is a simple germ-killer at home.