Octameter

n.	1.	(Pros.) A verse containing eight feet; as, - Deep` in|to` the | dark`ness | peer`ing, | long` I | stood` there | wond'`ring, | fear`ing.
	2.	(Chem.) A molecule composed of eight monomer units bound to each other, usually in a linear array; as, an octomer formed of nucleotides is called an octonucleotide.

Noun

1.

octameter - a verse line having eight metrical feet

verse, verse line