1.Definition: (computer science) a tiny ferrite toroid formerly used in a random access memory to store one bit of data; now superseded by semiconductor memories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"

Category: Objects

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

Category: Objects

3.Definition: a cylindrical sample of soil or rock obtained with a hollow drill

Category: Objects

4.Definition: a small group of indispensable persons or things

"Five periodicals make up the core of their publishing program"

Related Noun(s):nucleus

Category: General

5.Definition: an organization founded by James Leonard Farmer in 1942 to work for racial equality

Category: General

6.Definition: the center of an object

"The ball has a titanium core"

Category: Places

7.Definition: the central meaning or theme of a speech or literary work

Related Noun(s):burden, effect, essence, gist

Category: General

8.Definition: the central part of the Earth

Category: Objects

9.Definition: the chamber of a nuclear reactor containing the fissile material where the reaction takes place

Category: Objects

10.Definition: the choicest or most essential or most vital part of some idea or experience

Related Noun(s):center, centre, essence, gist, heart, inwardness, kernel, marrow, meat, nub, pith, substance, sum

Category: General