noun

microorganism

microorganism

Bacteria are a type of microorganism.

Bacteria are a type of microorganism.

Some microorganisms can cause disease.

Some microorganisms can cause disease.

a/an microorganism a tiny living thing Bacteria are a type of microorganism.

Synonyms: microbe, germ, bacterium

From the prefix 'micro-' meaning 'small' and 'organism' meaning 'a living being'.

Think of a 'micro' (tiny) 'organism' that you can only see with a microscope.

This page is designed for learning support. Please use it as a learning reference, not as a formal reference.