antibiotic

/ˌæn.taɪ.baɪˈɒt.ɪk/noun

A substance that kills bacteria or stops similar microorganisms from growing.

Example sentences

“The doctor prescribed an antibiotic for the infection.”
“Finish the whole course of antibiotics, even if you start feeling better.”

Works only against bacteria. Doctors stress that antibiotics do nothing for colds and flu, which are caused by viruses.

Often confused with antibiotic

antibiotic vs antiseptic: antiseptic (adjective): Able to stop harmful germs from causing infection.

Related words

painkillerA medicine taken to reduce or stop pain.ointmentA thick, oily cream, usually containing medicine, that you rub on the skin to treat or soothe it.dosageThe giving of medicine in a specific, measured quantity.plasterA building material that goes on walls and ceilings as a wet paste and hardens into a smooth, solid layer; it is usually based on gypsum, lime, or cement.tabletA thin, flat portable computer that you control by touching its screen. It is bigger than a phone and usually has no built-in keyboard.stitchA short piece of thread that a doctor sews through the skin to close a cut or wound.