1. octosyllable - Noun
2. octosyllable - Adjective
Octosyllabic.
A word of eight syllables.
Source: Webster's dictionaryCaesura is typical for syllabic metres of French and Polish poetry and for "osmerac" (octosyllable) and "deseterac" (decasyllable) of Serbocroatian folk song. Source: Internet
In english poetry caesura is typical for trochaic octosyllable of church hymns while iambic metres have no caesuras. Source: Internet