Tĕt'ra-dī-a-pā'son, n.
n. [Gr. τέτρα, for τέτταρα, four, and διαπασῶν, the octave. See DIAPASON.] (Anc. Mus.) A quadruple diapason, or octave; a musical chord;—called also quadruple eighth, or twenty-ninth.
n. [Gr. τέτρα, for τέτταρα, four, and διαπασῶν, the octave. See DIAPASON.] (Anc. Mus.) A quadruple diapason, or octave; a musical chord;—called also quadruple eighth, or twenty-ninth.