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Atonal

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Merriam-Webster's Collegiate Dictionaryaton·al \(ˌ)ā-ˈtō-nəl, (ˌ)a-\ adjective ETYMOLOGY  a- (II) + tonal
 DATE  1922
: marked by avoidance of traditional musical tonality; especially : organized without reference to key or tonal center and using the tones of the chromatic scale impartially• aton·al·ism  \-nə-ˌli-zəm\ noun• aton·al·ist  \-list\ noun• ato·nal·i·ty  \ˌā-tō-ˈna-lə-tē, ˌa-\ noun• aton·al·ly  \(ˌ)ā-ˈtō-nə-lē, (ˌ)a-\ adverb
English Etymologyatonal  1922, from a- "not" (see a- (2)) + tonal (see tone). Atonality is recorded from 1958.
Oxford Advanced Learner's Dictionary-牛津双解-OALD7atonalatonal / ei5tEunl; NAmE ei5tounl / adjective   (of a piece of music 乐曲) not written in any particular key    无调的   OPP  tonal • aton·al·ity / 7eitEu5nAlEti; NAmE 7eitou5n- / noun [U] 
Webster's Third New International Dictionary, Unabridgedaton·al\(ˈ)ā|tōnəl, (ˈ)a|- also əˈ-\ adjectiveEtymology: a- (II) + tonal: characterized by avoidance of traditional tonality• aton·al·ly \-əlē, -i\ adverb

Tonal Noun Atonal ə Adjective Aton·Al L ˌ)A \\