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trace element

génér. substância mineral em quantidades mínimas da dieta alimentar
agric. micronutriente
envir. microelementos
soins., industr., chim. elemento vegetal; microelemento
écon. oligoelemento
trace elements
envir. oligoelementos
trace element Any of various chemical elements that occur in very small amounts in organisms and are essential for many physiological and biochemical processes
envir. microelementos