Searching with wildcards—sometimes referred to as truncation—means using a special character, typically an asterisk, to indicate that you want to look for variations on a particular word: for instance, you might enter medic* to find references to medical, medicine, medicinal, and medication.
Rules differ from one search engine to the next, but most require that you use at least three other characters along with the asterisk. And it's usually a good idea to also include at least one specific keyword in your query ( Figure 3.10 ). Otherwise, your search may take painfully long and return too many hits to be truly useful.
Figure 3.10 A wildcard search is likely to be excruciatingly slow unless you include at least one other, specific term in your search request, as shown here.