How to Say "nucleus" in Spanish
The Spanish word for “nucleus” is “núcleo” — B2 level.
English → SpanishB2
nounB2formal
scientific (atom or cell)

Examples
El núcleo de la célula contiene la información genética.
The nucleus of the cell contains the genetic information.
En el núcleo del átomo se encuentran los protones y neutrones.
Protons and neutrons are found in the atomic nucleus.
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