The noun is "Iambus". It is a rhythm: short long; short long; short long; ... Read one of Shakespeare's sonnets. You'll see it there.

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The "iambos" refers to the Greek word which means "skip" (going from memory of Greek Theatre lectures here). A short/weak syllable followed by a long one: . - So an iambic pentameter is five of these rhythmic pairs (penta-meter) , "in a skipping fashion". As in Shakespeare: . - . - . - . - . - Technically the reverse meter - long-short - is trochaic, but hey we're not so fussy, we'll still call it iambic. As long as it skips. :) PS. Sorry johar, if you wish to cut-and-paste could you please add that you are quoting from answers.com? Ta.

(eye-am-bik pen-tam-uh-tuhr) The most common meter in English verse. It consists of a line ten syllables long that is accented on every second beat (see blank verse). These lines in iambic pentameter are from The Merchant of Venice, by William Shakespeare: Ĭn sóoth,/Ĭ knów/nŏt whý/Ĭ ám/sŏ sád. Ĭt wéa/riĕs mé;/yŏu sáy/ĭt wéa/riĕs yóu.... Iambic pentameter is a commonly used metrical line in traditional verse and verse drama. The term describes the particular rhythm that the words establish in that line. That rhythm is measured in small groups of syllables; these small groups of syllables are called "feet". The word "iambic" describes the type of foot that is used (in English, an unstressed syllable followed by a stressed syllable). The word "pentameter" indicates that a line has five of these "feet".

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