La parte central de un átomo o de una célula.
The central part of an atom or a cell.
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See how the word “núcleo” is used in sentences
El núcleo concentra casi toda la masa. — The nucleus holds most of the mass.
¿Dónde está el núcleo en esta célula? — Where is the nucleus in this cell?
Al microscopio se veía un núcleo oscuro. — Under the microscope we could see a dark nucleus.
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