Sometimes the SHORT explanation is what you really need. From acolyte to zodiac, this is the pocket glossary of terminology commonly used by Wiccans, Pagans and Heathens. Includes pronunciations and symbol graphics.
This book is exactly what it says it is: A pocket-sized dictionary of occult and neo-Pagan terminology. Not a bad reference for the price. Most people will search out definitions online (I do the same) but it's still a good idea to keep an actual printed reference handy.