metrical foot consisting of one short syllable (as in classical verse) or one unstressed syllable (as in English verse) followed by one long or stressed syllable, as in the word ˘be|causé . Considered by the ancient Greeks to approximate the natural rhythm of speech, iambic metres were used extensively for dramatic dialogue, invective, satire, and fables. Also suited to the cadence of the English language, iambic rhythms, especially iambic tetrameter and pentameter, are the preeminent metres of English verse. Substitution of other types of feet to add variety is common in basically iambic verse. An example of iambic metre is the English ballad, composed of quatrains written in alternating lines of iambic tetrameter and iambic trimeter. For example: