ottava rimayoudaoicibaDictYouDict[ottava rima 词源字典]
1820, Italian, "eight-lined stanza," literally "eighth rhyme," from ottava "eighth" (see octave). A stanza of eight 11-syllable lines, rhymed a b a b a b c c, but in the Byronic variety, they are English heroic lines of 10 syllables.[ottava rima etymology, ottava rima origin, 英语词源]