There are lots of different types of delays, and the different terms used to describe some of them can become baffling at times. This article from Sound on Sound really helped me define the different types, and to get more familiar with terminology
http://www.soundonsound.com/sos/may12/articles/designer-delay.htm
By becoming familiar with the different types of delay, it will help me when designing one to use in a mix, and how to select the one appropriate to the application.
samuellewis5515 