nucleus

Reading level: hard

Estimated CEFR level: C2 — Proficiency

Estimated from word frequency; not an official CEFR classification.

Definition

  1. noun a part of the cell containing DNA and RNA and responsible for growth and reproduction
  2. noun the positively charged dense center of an atom
  3. noun a small group of indispensable persons or things

In classic literature

Synonyms

cell nucleus, karyon

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