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  Diatribe \Di"a*tribe\ (?; 277), n. [L. diatriba a learned
     discussion, Gr. ?, prop., a wearing away of time, fr. ? to
     rub away, spend time; dia` through + ? to rub: cf. L. terere,
     F. trite: cf. F. diatribe.]
     A prolonged or exhaustive discussion; especially, an
     acrimonious or invective harangue; a strain of abusive or
     railing language; a philippic.
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           The ephemeral diatribe of a faction.     --John Morley.
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