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mellifluence

mellifluence
  (mɛˈlɪfluːəns)
  [f. next: see -ence.]
  The state or quality of being mellifluent.

a 1631 Donne Serm. (1640) 806 In which, (as S. Bernard also expresses it, in his mellifluence) Mutua [etc.]. 1779–81 Johnson L. P., Dryden Wks. II. 418 The English ear has been accustomed to the mellifluence of Pope's numbers. 1841 D'Israeli Amen. Lit. (1867) 304 The mellifluence and flexibility of the vowelly language were favourable to unrhymed verse.

Oxford English Dictionary

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