core

noun

1
a bar of magnetic material (as soft iron) that passes through a coil and serves to increase the inductance of the coil
2
an organization founded by James Leonard Farmer in 1942 to work for racial equality
3
the chamber of a nuclear reactor containing the fissile material where the reaction takes place
4
(computer science) a tiny ferrite toroid formerly used in a random access memory to store one bit of data; now superseded by semiconductor memories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
5
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
6
the central meaning or theme of a speech or literary work
7
a small group of indispensable persons or things
five periodicals make up the core of their publishing program
8
the center of an object
the ball has a titanium core
9
the central part of the Earth
10
a cylindrical sample of soil or rock obtained with a hollow drill

Also useful for “core”:Unscrambler— Turn loose letters into real words