cats

a small animal with fur, four legs, a tail, and claws, usually kept as a pet or for catching mice

any member of the group of animals similar to the cat, such as the lion:

Examples:

a small, furry animal with four legs and a tail, often kept as a pet, or any of a group of related animals that are wild, and some of which are large and fierce, such as the lion

abbreviation for computerized axial tomography (= a way of taking pictures of structures inside the body)