Tautological \Tau`to*log"ic*al\, a. [Cf. F. tautologique.]
Involving tautology; having the same signification; as,
tautological expression. -- {Tau`to*log"ic*al*ly}, adv.
[1913 Webster]
{Tautological echo}, an echo that repeats the same sound or
syllable many times.
[1913 Webster]