core

core (http://definr.com/core)

     n 1: the center of an object; "do not eat the apple core"
     2: a small group of indispensable persons or things; "five
        periodicals make up the core of their publishing program"
        [syn: nucleus, core group]
     3: the central part of the earth
     4: 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" [syn: kernel, substance, center,
         essence, gist, heart, heart and soul, inwardness,
         marrow, meat, nub, pith, sum, nitty-gritty]
     5: a cylindrical sample of soil or rock obtained with a hollow
        drill
     6: an organization founded by James Leonard Farmer in 1942 to
        work for racial equality [syn: {Congress of Racial
        Equality}, CORE]
     7: the central meaning or theme of a speech or literary work
        [syn: effect, essence, burden, gist]
     8: the chamber of a nuclear reactor containing the fissile
        material where the reaction takes place
     9: a bar of magnetic material (as soft iron) that passes
        through a coil and serves to increase the inductance of
        the coil
     v : remove the core or center from; "core an apple"