Octave

An eight-line stanza or poem, of which there are several types:

ababbcbc: Chaucer's stanzaic form in The Monk's Tale
abbacddc, or abbaabba: the brace octave (for example, W. B. Yeats' "Two Songs from a Play")
abababcc: see Ottava rima
abaaabab: see Triolet