unknown composition
[/ʌnˈnoʊn kɒmpəˈzɪʃən/]
noun phrasefemininepl: unknown compositions / composições desconhecidas
composição desconhecida
1. A mixture, substance, or artistic work whose ingredients, components, or elements are not identified or recognized
The chemical analysis revealed an unknown composition that required further laboratory testing.
A análise química revelou uma composição desconhecida que exigia testes laboratoriais adicionais.
2. A musical piece or literary work by an unidentified or unnamed creator
The museum discovered a manuscript of unknown composition in the archive.
O museu descobriu um manuscrito de composição desconhecida no arquivo.
3. A structure or arrangement whose constituent parts or formula cannot be determined
Scientists attempted to reverse-engineer the device's unknown composition.
Os cientistas tentaram fazer engenharia reversa da composição desconhecida do dispositivo.
This technical term is commonly used in scientific, chemical, and archaeological contexts in both Brazilian and American English. In Brazil, it appears frequently in academic and laboratory settings. The phrase emphasizes uncertainty and the need for further investigation, reflecting scientific methodology.
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