Iambic pentameter

Is a metrical foot consisting of an unaccented syllable followed by an accented syllable. For example words like “unite” and “provide” are both iambic. Iambic is also the most common meter in English poetry, and writers like William Shakespeare, who people usually connect with this term, is using this meter in many of his sonnets.

My long two-pointed ladder’s sticking through a tree

Toward heaven still,

And there’s a barrel that I didn’t fill

Beside it, and there may be two or three

Apples I didn’t pick upon some bough.

But I am done with apple-picking now.

Essence of winter sleep is on the night.

http://www.poetryfoundation.org/learning/glossary-terms?letter=C