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Noun: tetrachord  'te-tru,kord
  1. A scale series of four sounds, of which the extremes, or first and last, constituted a fourth. These extremes were immutable; the two middle sounds were changeable

Derived forms: tetrachords

Encyclopedia: Tetrachord

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Teton Sioux
tetra
tetra-
tetrabasic acid
tetrabromo-phenolsulfonephthalein
tetracaine
tetrachlorethylene
tetrachloride
tetrachloroethylene
tetrachloromethane
tetrachord
tetrachoric correlation
tetrachoric correlation coefficient
Tetraclinis
Tetraclinis articulata
tetracyclic
tetracycline
tetrad
tetradecanoic acid
tetraethyl lead
tetrafluoroethylene