Sinonimi: nucleus | core group
1. The center of an object.
2. The central part of the earth.
3. The region of a nuclear reactor containing the fissile material where the reaction takes place.
4. A small group of indispensable persons or things; SYN. nucleus, core group.
5. A rod of magnetic material (as soft iron) that passes through a coil and serves to increase the inductance of the coil.
6. A cylindrical sample of soil or rock obtained with a hollow drill.