Amphibrach

From Wikinfo

An amphibrac is a metrical foot used in formal poetry. It consists of a long syllable between two short syllables.

Amphibracs are never used to construct a whole, serious poem. So they mainly occur as variants within, say, an anapaestic structure.

References

• Adapted from the Wikipedia article, "Amphibrach" http://www.wikipedia.org/wiki/Amphibrach