octosyllabus
octōsyllăbus, a, um, adj. [octo-syllaba],
- having eight syllables, octosyllabic (postclass.), Mar. Vict. p. 2598 P.
octōsyllăbus, a, um (-bŏs, ŏn ), composé de huit syllabes, octosyllabe : Ps. Bass. Metr. 306, 4.