Truncation/wildcard is a search technique which allows you to search databases for variant spellings of words simultaneously.
Truncation is placing a symbol after the root of a word.
Will retrieve collaborate, collaboration, collaborative, collaborations, collaborating
Will retrieve child, children, childhood, childbirth, children's
However, this doesn't work with all words. Truncation at col*
Will retrieve too many and too many unrelated results such as colonel, collection, college, cold, Colombia
The most common truncation/wildcard symbols are an asterisk (*), hash tag (#), or question mark (?), but this can vary by database so it is wise to check individual database Help pages.