Ultimobranchial Body, also known as UBB, is a small gland located near the thyroid gland in mammals. The UBB produces calcitonin, a hormone responsible for regulating calcium metabolism in the body. Despite being a technical term in anatomy, the word also has a set of antonyms. These includes words such as inferior, substandard, imperfect, flawed, inadequate, and incomplete among others. These antonyms are used to describe things that are not the best, the opposite of something that is perfect or complete. While often used in the context of anatomy, the antonyms for UBB are versatile and can be used in many other settings.