Interface is a verb or a noun referring to the coordination of two or more items or systems.
In order to streamline our system, we needed to interface our separate databases.[verb]
Suzanne is studying the interface between the
computer and the user. [noun]
Do not use the term interface in more general senses--as, for example, a synonym for meet.
Interphase combines the prefix inter-, meaning "between", with the base phase, meaning "stage"; thus, an interphase would be an intermediate stage or step. However, this word is seldom used.