1. A component or part that is not essential, relevant, or belonging to a particular thing; something foreign or unrelated that has been introduced
The report contained several extraneous elements that distracted from the main argument.
O relatório continha vários elementos estranhos que distraíram do argumento principal.
2. In technical or scientific contexts, an unwanted substance or factor that contaminates or interferes with a process
The laboratory must remove all extraneous elements before conducting the experiment.
O laboratório deve remover todos os elementos estranhos antes de conduzir o experimento.