Noah Webster
Disdiapason
DISDIAPASON, BISDIAPASON, noun [See Diapason.] In music, a compound concord in the quadruple ratio of 4:1 or 8:2.
DISDIAPASON diapente, a cocord in a sectuple ratio of 1:6.
DISDIAPASON semi-diapente, a compound concord in the proportion of 16:3.
DISDIAPASON ditone, a compound consontance in the proportion of 10:2.
DISDIAPASON semi-ditone, a compound concord in the proportion of 24:5.