ref·er·en·tial \|refə|renchəl\adjective Etymology: from reference (I), after such pairs as English difference : differential 1.: containing or constituting a reference : pointing to something out of itself < symbols are inherently referential > < referential rather than emotive use of words > 2.: of, relating to, or intended for reference < notes for referential use > • ref·er·en·tial·ly\-chəlē\adverb