Nucleus

jądro

(core, central part of something)

jądro

(physics: massive, positively charged core of an atom)

jądro

(cytology: large organelle found in cells)

jądro

(linguistics: centre of a syllable)

jądro komórkowe

(cytology: large organelle found in cells)

nukleus

(cytology: large organelle found in cells)

rdzeń

(initial part which will receive additions)