Sentence:  Perhaps the most engaging of the Rowley poems are "An Excelente Balade of Charitie," written in the <WSD>rhyme royal</WSD>; and "The Bristowe Tragedie," in the common ballad stanza. 
Meaning of the word marked with <WSD> tags:  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 Geoffrey Chaucer ("c."1343-1400).