colon The colon is part of the digestive system. The colon absorbs water from the partly-digested into the body.
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colon A colon is a punctuation mark that is used to introduce a list in a sentence or a quote, to separate two major parts of a sentence, to indicate a ratio (like 1:2) or a time (8:15). For example: These students were on the honor roll: Lisa, Jason, and Jessica.