core

ot noun

1. The central part of fruit, containing the kernels or seeds. the core of an apple or quince
2. The center or inner part of a space or area the core of a square
3. The most important part of a thing; the essence. the core of a subject
4. An individual computer processor, in the sense when several processors (called cores or CPU cores) are plugged together in one single integrated circuit to work as one (called multi-core processor). I wanted to play a particular computer game, which required I buy a new computer, so while the game said it needed at least a dual-core processor, I wanted my computer to be a bit ahead of the curve, so I bought a quad-core.

fe’l verb

1. To remove the core of an apple or other fruit.
2. To extract a sample with a drill.