rhyme royal

rhyme royal puhekieltä A form of English verse consisting of seven-line stanzas of iambic pentameter having a rhyme scheme of ababbcc, first represented in English in works by w:Geoffrey Chaucer|Geoffrey Chaucer (c.1343-1400).
1898, Henry Augustin Beers, 18th Century: A History of English Romanticism, ch. 10:

Perhaps the most engaging of the Rowley poems are "An Excelente Balade of Charitie," written in the rhyme royal; and "The Bristowe Tragedie," in the common ballad stanza.

Chaucer for years before the Prologue to LGW had been writing heroic couplets at the close of each of his rhymes royal.