core

Noun

• a bar of magnetic material (as soft iron) that passes through a coil and serves to increase the inductance of the coil

• the chamber of a nuclear reactor containing the fissile material where the reaction takes place

• (computer science) a tiny ferrite toroid formerly used in a random access memory to store one bit of data; now superseded by semiconductor memories
  • each core has three wires passing through it, providing the means to select and detect the contents of each bit
    

• the central meaning or theme of a speech or literary work

• an organization founded by James Leonard Farmer in 1942 to work for racial equality

• a cylindrical sample of soil or rock obtained with a hollow drill

• the choicest or most essential or most vital part of some idea or experience
  • the gist of the prosecutor's argument
    
  • the heart and soul of the Republican Party
    
  • the nub of the story
    

• the central part of the Earth

• the center of an object
  • the ball has a titanium core
    

• a small group of indispensable persons or things
  • five periodicals make up the core of their publishing program
    

Verb

• remove the core or center from
  • core an apple
    

Related words

• Synonyms: 
  magnetic core , effect , essence , burden , gist , Congress of Racial Equality , CORE , kernel , substance , center , centre , heart , heart and soul , inwardness , nucleus , core group