Rubaʿi the convention is sometimes extended so that the unrhymed line of the current stanza becomes the rhyme for the following stanza. The structure can be made cyclical by linking the unrhymed line of the final stanza back to the first stanza: ZZAZ. These more stringent systems were not, however, used by FitzGerald in his "Rubaiyat". Rubaʿi Rubāʿī (from "rubāʿiyy", plural "rubāʿiyāt") is the term for a quatrain, a poem or a verse of a poem consisting of four lines. It refers specifically to a form of Persian poetry, or its derivative form in English and other languages In classical Persian
Triadic-line poetry Triadic-line poetry Triadic-line poetry or stepped line is a long line which "unfolds into three descending and indented parts". Created by William Carlos Williams, it was his "solution to the problem of modern verse" and later was also taken up by poets Charles Tomlinson and Thom Gunn. Williams referred to the prosody of triadic-line poetry as a "variable foot", a metrical device to resolve the conflict between form and freedom in verse. Each of the three staggered lines of the stanza should be thought of as one foot, the whole stanza becoming a trimeter line. Williams' collections "Journey to Love"