The term absorbed dose refers to the amount of energy deposited by radiation per unit mass of an irradiated material. There are several synonyms used to describe this term, including radiation dose, dose equivalent, and exposure. The radiation dose is a measure of the amount of energy that is deposited by ionizing radiation in any given material. Dose equivalent quantifies not only the amount of energy deposited but also the biological effects that radiation can have on living tissue. Exposure, on the other hand, refers to the amount of ionizing radiation in air. Regardless of the terminology used, it is critical to understand the significance of absorbed dose and its potential impact on human health and safety.