found: Cuddon, J.A. A dictionary of literary terms and literary theory, c1998(rímur: A form of Icelandic metrical romance which originated in the 14th century. They were narrative poems based on heroic tales and composed, for the most part, in alliterative four-line stanzas. They were complex in meter and the kenning occurs frequently.)
found: The Princeton encyclopedia of poetry and poetics, c2012(Rímur (pl.; singular: ríma). A form of stanzaic narrative poetry, cognate ME rime, surviving from the mid-14th century. Rímur are Icelandic poems in multiple fits, a ríma having only one. The four-line Latin hymn stanza was adapted to include alliteration and the complicated poetic vocabulary of kenning and heiti borrowed from skaldic poetry)
found: Merriam-Webster's encyclopedia of literature, c1995(Rimur: singular rima.Versified sagas, or episodes from sagas, a form of adaptation that was popular in Iceland from the 15th century, One of three early genres of popular early Icelandic poetry (the other two being dances and ballads), rimur were produced from the 14th to the 19th century. Originally used for dancing, they combine an end-rhymed metrical form derived from Latin hymns with the techniques of syllable counting, alliteration, and internal rhyme used by the earlier Norse court poets, the skalds. Most rimur are long narratives based on native tradition or foreign romances. Often a long prose cycle was converted into a rimur cycle.)
