Common metre

Common metre or common measure—abbreviated as C. M. or CM—is a poetic metre consisting of four lines that alternate between iambic tetrameter and iambic trimeter, with each foot consisting of an unstressed syllable followed by a stressed syllable. The metre is denoted by the syllable count of each line, i.e. 8.6.8.6, 86.86, or 86 86, depending on style, or by its shorthand abbreviation "CM".

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