n. a thing or part forming the center around which other things or parts are grouped or collected
The nucleus of a hydrogen atom is a proton.
The nucleus of a hydrogen atom is a proton.
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Herniated nucleus pulposus is also known as a slipped disk.
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The nuclear envelope surrounds the nucleus and all of its contents.
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center; hub; focus; pivot
outside
3 syllables
nu-cle-us
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