If you spend very much time looking up articles on Wikipedia, you might find it helpful to use a dedicated app. Quickipedia for Mac is a a fast, minimal Wikipedia client that you can access directly from your menu bar to quickly and efficiently look up articles.
The developer offers the following description:
Quickipedia is Wikipedia at its minimal best. Read Wikipedia in a beautiful, unobtrusive client only on your Mac. Whether you want a quick peek at an article, or have fun reading random articles, Quickipedia lets you do it – fast!
The app has a very simple, elegant interface, and is built primarily for speed and efficiency.
Screenshots and additional info can be found below:
Here are the top five features you can expect to see in the latest version:
Price: $1.99 (App Store link).
Requirements: Mac running OS X 10.7 or later.
Developer: Arvindh Sukumar
Website: http://www.behindtechlines.com/projects/