Antibiotic (noun)

A substance or drug that kills or slows the growth of bacteria and other microorganisms.

Origin:

Derived from greek words 'anti' meaning 'against' and 'bios' meaning 'life'.

Examples:

1. The doctor prescribed a course of antibiotics to treat the patient's bacterial infection.
2. Overuse of antibiotics can lead to antibiotic resistance, making it more difficult to treat infections.
3. Penicillin was one of the first antibiotics discovered and is still widely used today.
4. The development of antibiotics revolutionized modern medicine and has saved countless lives.
5. Antibiotics are typically used to treat bacterial infections, but are not effective against viral infections.