mirabiledictu

mi·ra·bi·le dic·tu (mĭ-rä'bĭ-lē dĭkʹto͞o) interj.

Wonderful to relate.

  [Latin mīrābile dictū: mīrābile, neuter sing. of mīrābilis, wonderful + dictū, ablative sing. supine of dīcere, to say.]

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