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The Iambic trimeter is a meter of poetry consisting of three iambic units (each of two feet) per line.

In ancient Greek poetry and Latin poetry, an iambic trimeter is a quantitative meter, in which a line consists of three iambic metra. Each metron consists of the pattern | x – u – |, where "–" represents a long syllable, "u" a short one, and "x" an anceps (either long or short). Resolutions were common, especially in the first two metra of the line, so that any long or anceps syllable except the last could be replaced by two short syllables (see for example Euripides#Chronology), making a total of 13 or more syllables. It is the most common meter used for the spoken parts (as opposed to the sung parts) of Ancient Greek tragedy, comedy, and satyr plays. It is also common in iambus or 'blame poetry', although it is not the only meter for that genre.[1]

In the accentual-syllabic verse of English, German, and other languages, however, the iambic trimeter is a meter consisting of three iambs (disyllabic units with rising stress) per line, making a line of six syllables.



Basic formEdit

The iambic trimeter derives its name from its essential shape, which is three metrical units (hence "trimeter") which are each basically iambic in form. The iambic metron has the following shape (where "x" is an anceps (which may be either long or short), "–" is a long syllable, and "u" is a short one):

| x – u – |

The trimeter simply repeats this structure three times, with the resulting shape as follows:

| x – u – | x – u – | x – u – |

As always, the last syllable of a verse is counted as long even if naturally short (brevis in longo).

An example of the structure:

πέραν γε πόντου καὶ τόπων Ἀτλαντικῶν
péran ge póntou kaì tópōn Atlantikôn
| u – u – | – – u – | u – u – |
(Euripides, Hippolytus 1053)

Caesura and bridgeEdit

A caesura (break between words) is usually found after the fifth or seventh element of the line. In the example above, it is found after the fifth element, as so (with¦representing the caesura):

| u – u – | –¦– u – | u – u – |

Finally, Porson's Law is observed, which means here that if the anceps of the third metron is long, there cannot be a word-break after that anceps. The second anceps is free from this constraint, because a word-break at that point would be a main caesura.


The Greek iambic trimeter allows resolution, allowing more variety. In tragedy, resolving the anceps elements is rare, except to accommodate a proper name, but resolution of the long elements is slightly more common. In comedy, which is closer to casual speech, resolution is fairly common.

In both tragedy and comedy, though, the third metron is usually left alone; resolution in the final metron of the line is rare.

In tragedy, resolutions are virtually never consecutive, and two instances in the same line are rare.

When resolution occurs, the resulting two shorts are almost always within the same word-unit.

Latin iambic senariusEdit

The iambic trimeter was imitated in Latin by 2nd century BC comic playwrights such as Plautus and Terence, where it is known as the iambic senarius. It is the most commonly used meter in their plays, especially in Terence, and it is the only meter which was used purely for dialogue without musical accompaniment. In Latin the basic meter was as follows:

| x – x – | x – x – | x – u – |

That is to say, the 3rd and 7th elements, which were always short in Greek, were anceps (either long or short) in Latin; in fact they are long 60% of the time, while the formerly anceps syllables (the 1st, 5th, and 9th elements) are long in 80-90% of lines.[2] As in the Greek trimeter, any long or anceps syllable except the last could be replaced with a double short syllable (u u). As in Greek, there was usually (although not always) a caesura (word-break) after the fifth element.

An example of a Latin iambic senarius (from the prologue to Plautus' Aulularia) is the following:

Ne quís mirétur quí sim, páucis éloquár.
| – – – – | – – – – | – – u – |
"In case anyone should wonder who I am, let me explain in a few words."

A difference between Latin and Greek iambics was that the Latin senarius was partly accentual, that is to say the words were arranged in such a way that very often (especially in the first half of the verse), the word accents coincided with the strong points of the line, that is the 2nd, 4th, 6th etc. elements of the verse. Thus even in lines where nearly all the syllables were long as in the above verse, it is possible to feel the iambic rhythm of the line.

Accentual-syllabic iambic trimeterEdit

In English and similar accentual-syllabic metrical systems, a line of iambic trimeter consists of three iambic feet. The resulting six-syllable line is very short, and few poems are written entirely in this meter.

The 1948 poem "My Papa's Waltz" by Theodore Roethke uses the trimeter:

...We romped until the pans
Slid from the kitchen shelf;
My mother's countenance
Could not unfrown itself.

William Blake's "Song ('I Love the Jocund Dance')" (1783) uses a loose iambic trimeter that sometimes incorporates additional weak syllables:

I love the jocund dance,
The softly breathing song,
Where innocent eyes do glance,
And where lisps the maiden's tongue.
I love the laughing gale,
I love the echoing hill,
Where mirth does never fail,
And the jolly swain laughs his fill.

As a component of common meterEdit

The English iambic trimeter is much more frequently encountered as one-half of the common meter, which consists of alternating iambic tetrameter and trimeter lines:

O God Our help in ages past
Our hope in years to come
our shelter from the stormy blast
And our eternal home
Isaac Watts, a paraphrase of Psalm 90," Our God, Our Help in Ages Past,

Another example, from the American poetess Emily Dickinson:

If you were coming in the fall
I'd brush the summer by
With half a smile and half a spurn,
As housewives do a fly.
Emily Dickinson, "If You Were Coming in the Fall"


  1. ^ Douglas E. Gerber, Greek Iambic Poetry, Loeb Classical Library (1999), page 1
  2. ^ Gratwick, A.S. (1993) Plautus: Menaechmi (Cambridge), p. 44.

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