Rhymed pairs of iambic pentameter lines form the heroic couplet. Iambic hexameter is a meter referring to a line consisting of six iambic feet. Couplets in iambic pentameter are called "heroic couplets". Iambic trimeter is a meter referring to a line consisting of three iambic feet. The poem consists of four quatrains in abab iambic pentameter. The poem is written in 28 rhyming couplets of iambic pentameter. A line of iambic pentameter comprises five consecutive iambs. Iambic dimeter is a meter referring to a line consisting of two iambic feet. The Ode is written in iambic pentameter. Shakespeare's standard poetic form was blank verse, composed in iambic pentameter. The rhyme royal stanza consists of seven lines, usually in iambic pentameter. "Endymion" is written in rhyming couplets in iambic pentameter (also known as heroic couplets). Lines of unrhymed iambic pentameter are commonly known as blank verse. Iambic pentameter became the prevalent meter in English. Dunbar, in particular, wrote poems in true iambic pentameter.