DictionarygermMicroorganism
noun

germ

JURM/dʒɜːrm/

A microorganism, especially one that can cause disease.

Washing your hands with soap helps remove germs from your skin.

A microscope inset shows small bacteria beside a handwashing scene, disease-causing microorganisms without cartoon monsters.
Etymology

Latin germen meant a sprout or bud. Through the image of a disease’s “seed,” germ came to mean a tiny disease-causing organism.

In context

Daddy Doc12:24
When germs get into your nose, your body sends tiny germ fighting cells
Snot, Boogers, Sneezes & Allergies! 🤧 | Kids Learn Why Your Nose Does That

More examples

  • A single germ can multiply quickly under the right conditions.
  • She covers her cough to avoid spreading germs.
  • This cleaner kills germs on kitchen counters.

Forms

germ · germs

germicide noun — A substance that kills harmful microorganisms.

Similar words

microbe
A neutral term for a microscopic organism, not necessarily harmful.
microorganism
A more technical term that includes harmless microscopic organisms.
pathogen
Specifically a disease-causing agent, rather than any microscopic organism.