noun
a small group of indispensable persons or things
Synonyms
Examples
- five periodicals make up the core of their publishing program
noun
the center of an object
Examples
- the ball has a titanium core
noun
the central part of the Earth
noun
the choicest or most essential or most vital part of some idea or experience
Synonyms
Examples
- the gist of the prosecutor's argument
- the heart and soul of the Republican Party
- the nub of the story
noun
a cylindrical sample of soil or rock obtained with a hollow drill
noun
an organization founded by James Leonard Farmer in 1942 to work for racial equality
Synonyms
Congress of Racial Equality
noun
the central meaning or theme of a speech or literary work
Synonyms
noun
(computer science) a tiny ferrite toroid formerly used in a random access memory to store one bit of data
Synonyms
magnetic core
Examples
- now superseded by semiconductor memories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
noun
the chamber of a nuclear reactor containing the fissile material where the reaction takes place
noun
a bar of magnetic material (as soft iron) that passes through a coil and serves to increase the inductance of the coil
verb
remove the core or center from
Examples
- core an apple