Source : Webster's Revised Unabridged Dictionary (1913)

Conceptional \Con*cep"tion*al\, a.
   Pertaining to conception.

Source : WordNet®

conceptional
     adj : being (or being of the nature of) a notion or concept; "a
           plan abstract and conceptional"; "to improve notional
           comprehension"; "a notional response to the question"
           [syn: {ideational}, {notional}]