Published 2026-09-12

nucleus

Where did “nucleus” come from? The story of “nucleus” is in the slides. #words #vocabulary

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   KNOW MORE ABOUT THIS WORD: “nucleus”. Say it: /ˈnjuː.kli.əs/
   Meaning: The cell structure containing DNA and RNA and governing growth and reproduction.

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   THE QUESTION: “nucleus”. Where did “nucleus” come from?
   The history comes next.

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   WHERE IT BEGAN: “nucleus”. Nucleus was adopted from Latin nucleus, a kernel. That noun was connected with nucula, a little nut, the diminutive of nux, nut. English first used nucleus for a kernel or compact central body before science gave it several specialized centers.

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   HOW IT GOT THERE: “nucleus”. The kernel inside a shell supplied a durable picture of a compact center. Astronomers applied nucleus to a comet's bright center, biologists to the body inside a cell, and physicists to the tiny central part of an atom. The scientific objects differ, but the kernel metaphor holds them together.

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   PLAY LEXIFOUR: Try five more words. Play the free daily vocabulary game at lexifour.com.
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