virelai
A medieval poetic form consisting of two or more three line units in each stanza, with the rhyme scheme AABAAB.
historical
Bransles, Ballads, virelayes, and verses vaine [...].
Now making layes of loue and louers paine,
Where it comes from
From Old French virelai, alteration (after lai) of vireli.
Adapted from the Wiktionary entry virelai (CC BY-SA 4.0).