Definitions for nucleus

Definitions for (noun) nucleus

Main entry: lens nucleus, nucleus

Definition: the central structure of the lens that is surrounded by the cortex

Main entry: nucleus, karyon, cell nucleus

Definition: a part of the cell containing DNA and RNA and responsible for growth and reproduction

Main entry: nucleus

Definition: any histologically identifiable mass of neural cell bodies in the brain or spinal cord

Main entry: nucleus, core, core group

Definition: a small group of indispensable persons or things

Usage: five periodicals make up the core of their publishing program

Main entry: nucleus

Definition: the positively charged dense center of an atom

Main entry: nucleus

Definition: (astronomy) the center of the head of a comet; consists of small solid particles of ice and frozen gas that vaporizes on approaching the sun to form the coma and tail

Visual thesaurus for nucleus