Scute, also known as a keratinized plate or scale, is a protective structure that covers the skin of some animals. This structure can be found in reptiles, birds, and occasionally, mammals. The word scute can be replaced with other terms that describe similar structures, depending on the type of animal. For example, a reptile scute can also be called a scale or a bony plate. In birds, it is referred to as a feather follicle or a feather quill. In mammals, scutes can be replaced with epidermal ridges or hair cells. These synonyms help scientists identify and describe these physical features during research and documentation.