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core
noun
- the hard, central part of an apple, pear, etc., that contains the seeds
- the central or innermost part of anything
- the most important part, as of a matter, discussion, etc.; essence; pith
- in foundry work, that part of a mold which forms the interior of a hollow casting
- a cylindrical sample of earth strata, as of rock, soil, snow, or ice, that is removed from the ground or ocean floor by boring with a long hollow drill and used to study the various layers of material that were deposited over a long period of geologic time
- the central region of a nuclear reactor that contains the fissile fuel, and usually, control rods, moderator, etc.
- the wood center to which outer layers of veneer are attached
- Chem. the nucleus together with the closed electron shells of an atom; kernel
- Elec. a mass of magnetic material placed inside a wire coil, serving to channel and increase the strength of the magnetic field resulting from current in the coil
- Geol. the central zone inside the earth that begins at a depth of c. 2,900 km (c. 1,800 mi): it is extremely hot and has a liquid outer part and a solid inner part that are thought to be composed of iron and nickel
adjective
central, basic, or most important; main: core values, core knowledge
Congress of Racial Equality
See core in American Heritage Dictionary 4
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