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non-tonal
non-tonal adj.
Brit. 
/(ˌ)nɒnˈtəʊnl/
, /(ˌ)nɒnˈtəʊnl/U.S. /ˌnɑnˈtoʊn(ə)l/
/ˌnɑnˈtoʊn(ə)l/ΚΠ
1922 Mus. Opinion Oct. 48/1 I have been working for two years at a system of non-tonal harmony.
1964 R. H. Robins Gen. Linguistics iii. 111 English, a non-tonal language.
1982 Listener 23 Dec. 48/2 It would be unable to function in a non-tonal context.
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