The term Tapetum refers to a specialized layer of cells found in the eyes of many animals that reflects light, thereby improving their night vision. There are various synonyms for the word tapetum, including choroid tapetum, tapetum lucidum, and retro tapetum. Choroid tapetum is a specific type of tapetum located in the eye's choroid layer, while tapetum lucidum refers to the reflective layer in eyeshine organisms. Retro tapetum, on the other hand, describes the tapetal layer found at the back of the eye. All three terms are often used interchangeably to describe this specific structure in animals' eyes and its role in improving visual acuity in low-light conditions.