Mammals

Mammals are warm-blooded vertebrates with hair or fur, mammary glands, and a neocortex region in the brain. Mammals are animals that usually give birth to live young (with the exception of monotremes), have hair or fur, sweat glands, mammary glands, three middle ear bones and a neocortex region in the brain.

Meaning to the breast, another the word "mammal" is based on the Latin mamma, which is the Latinised form of the Greek μαμμα ("mamma'").