(n.) The act of running down; a lapse.

Alexandrine accent accentuation acciaccatura amphibrach amphimacer anacrusis anapest antispast appoggiatura arabesque arsis authentic cadence bacchius bass passage beat bourdon bridge burden cadency cadenza caesura catalexis catenary chloriamb chloriambus chorus coda colon coloratura counterpoint cretic dactyl dactylic hexameter decline decurrence development diaeresis dimeter dipody division dochmiac droop elegiac elegiac couplet elegiac pentameter embellishment emphasis epitrite exposition false cadence feminine caesura figure fioritura flight flourish folderol foot grace grace note half cadence harmonic close heptameter heptapody heroic couplet hexameter hexapody iamb iambic iambic pentameter ictus imperfect cadence incidental incidental note interlude intermezzo introductory phrase ionic jingle lapse level of stress lilt long mordent lowering masculine caesura measure meter metrical accent metrical foot metrical group metrical unit metrics metron mixed cadence molossus mora mordent movement musical phrase musical sentence numbers ornament paeon part passage pentameter pentapody period phrase plagal cadence pralltriller primary stress proceleusmatic prosodics prosody pulse pyrrhic quantity refrain resolution response rhythm rhythmic pattern rhythmical stress ritornello roulade run sag secondary stress section single mordent sinkage slump spondee sprung rhythm stanza statement strain stress stress accent stress pattern submergence subsidence swag swing syzygy tailpiece tempo tertiary stress tetrameter tetrapody tetraseme thesis tribrach trimeter tripody triseme trochee turn tutti tutti passage variation verse weak stress