T1E1T1R1A1C3H4O1R1D2
16 points
TETRACHORD is validvalid
a musical chord with four notes [n TETRACHORDS]
a series of four sounds, forming a scale of two tones and a half [n -S]
a musical chord with four notes [n TETRACHORDS]
a series of four sounds, forming a scale of two tones and a half [n -S]