n. [ Octa- + Gr. me`ros part. ] (Chem.) A molecule composed of eight monomer units bound to each other, usually in a linear array; as, an octamer formed from eight nucleotides is called an octanucleotide. [ PJC ]

An example of an octapeptide might be represented using the standard abbreviations for the component amino acids, e.g.: met-ala-ser-glu-lys-ala-val-gly

An octanucleotide might be represented using the standard single-letter abbreviations for the component mononucleotides, e.g.: ATGCATGC. [ PJC ]

a. [ Octa- + Gr. me`ros part. ] (Biol.) Having the parts in eights; as, an octamerous flower; octamerous mesenteries in polyps. [ 1913 Webster ]