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The Collaborative International Dictionary
Tautological echo

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.

Tautological echo, an echo that repeats the same sound or syllable many times.