1. (noun) core, nucleus, core group
a small group of indispensable persons or things
Synonyms: nitty-gritty, meat, nucleus, core group, sum, inwardness, gist, heart and soul, lens nucleus, effect, substance, nub, center, burden, centre, kernel, magnetic core, essence, core, heart, karyon, marrow, pith, cell nucleus
2. (noun) core
the center of an object
Synonyms: nitty-gritty, meat, nucleus, core group, sum, inwardness, gist, heart and soul, effect, substance, nub, center, burden, centre, kernel, magnetic core, essence, heart, marrow, pith
3. (noun) core
the central part of the Earth
Synonyms: nitty-gritty, meat, nucleus, core group, sum, inwardness, gist, heart and soul, effect, substance, nub, center, burden, centre, kernel, magnetic core, essence, heart, marrow, pith
4. (noun) kernel, substance, core, center, centre, essence, gist, heart, heart and soul, inwardness, marrow, meat, nub, pith, sum, nitty-gritty
the choicest or most essential or most vital part of some idea or experience
Synonyms: affection, summation, warmness, sum of money, sum total, means, affectionateness, substance, center of attention, center field, content, nucleus, plaza, meaning, meat, bone marrow, centre, burden, stub, center, tenderness, snapper, core, totality, marrow, heart and soul, sum, fondness, total, nerve, core group, internality, marrow squash, nerve center, shopping center, aggregate, nub, join, kernel, nitty-gritty, union, spirit, centerfield, gist, warmheartedness, nerve centre, inwardness, centre of attention, pith, heart, shopping mall, nubble, bosom, mall, essence, ticker, message, pump, magnetic core, effect, mettle, shopping centre, perfume, spunk, philia, subject matter, amount of money, midpoint, vegetable marrow, eye, amount, middle
5. (noun) core
a cylindrical sample of soil or rock obtained with a hollow drill
Synonyms: nitty-gritty, meat, nucleus, core group, sum, inwardness, gist, heart and soul, effect, substance, nub, center, burden, centre, kernel, magnetic core, essence, heart, marrow, pith
6. (noun) Congress of Racial Equality, CORE
an organization founded by James Leonard Farmer in 1942 to work for racial equality
Synonyms: nitty-gritty, meat, nucleus, core group, sum, inwardness, gist, heart and soul, effect, substance, nub, center, burden, centre, kernel, magnetic core, essence, heart, marrow, pith
7. (noun) effect, essence, burden, core, gist
the central meaning or theme of a speech or literary work
Synonyms: substance, loading, perfume, meat, centre, burden, center, consequence, core, marrow, load, sum, impression, event, heart and soul, core group, upshot, effect, nub, kernel, nitty-gritty, gist, inwardness, pith, heart, nucleus, onus, essence, magnetic core, outcome, encumbrance, issue, force, incumbrance, result
8. (noun) core, magnetic core
(computer science) a tiny ferrite toroid formerly used in a random access memory to store one bit of data; now superseded by semiconductor memories
Synonyms: nitty-gritty, meat, nucleus, core group, sum, inwardness, gist, heart and soul, effect, substance, nub, center, burden, centre, kernel, magnetic core, essence, core, heart, marrow, pith
9. (noun) core
the chamber of a nuclear reactor containing the fissile material where the reaction takes place
Synonyms: nitty-gritty, meat, nucleus, core group, sum, inwardness, gist, heart and soul, effect, substance, nub, center, burden, centre, kernel, magnetic core, essence, heart, marrow, pith
10. (verb) core
a bar of magnetic material (as soft iron) that passes through a coil and serves to increase the inductance of the coil
Synonyms: nitty-gritty, meat, nucleus, core group, sum, inwardness, gist, heart and soul, effect, substance, nub, center, burden, centre, kernel, magnetic core, essence, heart, marrow, pith
11. (verb) core
remove the core or center from
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Synonyms for core 
