Joker
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. Some databases will use a ? and others may use an * or an ! .

psychol? will return records on psychology, psychological, psychologist when a
? is used as the truncation symbol.
environ* will return records on environment, environments, environmental when an
* is used as the truncation symbol.
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