Englishfor English speakers
colon
Noun
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The colon is a part of the digestive system.
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A colon is the sign :. It is often used in a sentence to indicate the beginning of a list.
Her grocery list had three items: bread, milk, and cheese.
bacterium
Noun
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Bacterium are organisms (living things) that have one cell.
He looked at the bacterium through the microscope.