The central or most important part; the essence.

• The inner part of a thing or area.

The muscles of the torso that stabilize the body.

The central part of a fruit containing seeds.

The central part of a device or material (reactor core, CPU core, magnetic core).

• A cylindrical support around which paper or film is wound.

A cylindrical sample of rock, ice, or material obtained by drilling.

• A small solid tissue sample taken by needle biopsy.

Forming the essential or central part; fundamental.

• Deeply and authentically involved in a sport’s surrounding culture.

To remove the central part of a fruit.

• To drill or cut to extract a cylindrical sample.