For any topic, it is very helpful to figure out what you don't know. What I don't know may help direct my efforts toward what I do want to know. The other word for this effort is context. For any search new or old, I always repeat a context search. Yes, I use Wikipedia and other library databases similar to it, such as Encyclopedia Britannica Online. I look at the large article databases, such as EBSCO's Academic Search Premier and use their thesaurus (list of Subject Terms). I look for my key concept or its synonyms. And then I see how it fits in the hierarchy. Such as:
I entered the browse term: gourds and it directed me to the broader term Cucurbitaceae and the subsets under it. So now I have what I assume are the the biological terms that I would need to use to search more precisely. Obviously, I don't know about genus and species information for this wonderful decorative fruit but I could learn. If I wanted to correctly identify one type of gourd and find information stored by that method, I would profit by using the scientific terms.