Dictionary entry

Tautological

Webster's Dictionary 1913

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.