delimiter[dē lim′it ər]
Comput. a letter, symbol, etc. used to set off one string of characters or item of data from another
A character or sequence of characters marking the beginning or end of a unit of data.
delimiter - Computer Definition
A character or combination of characters used to separate one item or set of data from another. For example, in comma delimited records, a comma is used to separate each field of data.