Warm-blooded (adjective)

Having a relatively constant internal body temperature, regardless of external conditions.

Origin:

Late 18th century: warm-blooded as a noun in the sense "a warm-blooded animal", from warm in the sense "having a high internal temperature" + blooded.

Examples:

1. Warm-blooded animals, such as mammals and birds, have to generate heat to maintain a constant body temperature.
2. The dog is a warm-blooded animal and has a thick coat to keep it warm in cold weather.
3. The shark is cold-blooded, it doesn't need to generate heat to maintain its body temperature.
4. Warm-blooded animals are able to live in a wider range of environments than cold-blooded animals.
5. Warm-blooded animals are able to be active in the cold weather, but cold-blooded animals become sluggish.