bacterium

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The Simple English Wikipedia has an article on:

Bacterium

Pronunciation change

IPA ^(key): /bækˈtɪər.ɪəm/
Audio (US) (file)

Noun change

Singular
bacterium

Plural
bacteria

The inside of a bacterium.

The structure of a bacterium.

(countable) Bacterium are organisms (living things) that have one cell.
He looked at the bacterium through the microscope.

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