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pentatonism

[pen-tuh-toh-niz-uh m, -to-]
noun Music.
  1. the use of a five-tone scale.
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Also pen·ta·ton·i·cism [pen-tuh-ton-uh-siz-uh m] /ˌpɛn təˈtɒn əˌsɪz əm/.

Origin of pentatonism

1965–70; pentaton(ic) + -ism
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018