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trace element

posp. substância mineral em quantidades mínimas da dieta alimentar
ekon. oligoelemento
ochr.środ. microelementos
opiek., przem., chem. elemento vegetal; microelemento
roln. micronutriente
trace elements
ochr.środ. 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
ochr.środ. microelementos