(a.) Having eight faces or sides; of, pertaining to, or formed in, octahedrons; as, octahedral cleavage.

contraoctave double contraoctave eightfold four-foot octave four-line octave great octave octadic octagonal octahedral octal octan octaploid octastyle octave octofid octonary octosyllabic octuple one-line octave ottava ottava alta ottava bassa small octave subcontraoctave tone row two-foot octave two-line octave