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Truncation

Truncation is like a wildcard. Added to the stem of a word, it will find that stem plus anything that comes after it. The symbol used to truncate a word depends upon the index, database, or Web search engine you are using.

psychol$

will return records on psychology, psychological, psychologist.
$ is used as the truncation symbol, for example, the LATech Catalog.

environ*

will return records on environment, environments, environmental.
* is used as the truncation symbol in many article indexes & databases.

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