core
noun.
a small group of indispensable persons or things
five periodicals make up the core of their publishing program
noun.
the center of an object
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
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
noun.
the central meaning or theme of a speech or literary work
noun.
(computer science) a tiny ferrite toroid formerly used in a random access memory to store one bit of data; now superseded by semiconductor memories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
Synonym: magnetic core
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
core an apple