Endocytosis is the process of a cell absorbing molecules or materials from its surroundings by engulfing them with its membrane. When this occurs, it is referred to as endocytosis or endocytosed. Other synonyms for the word endocytosed include internalized, engulfed, assimilated, or absorbed. These terms all refer to the same process of a cell taking in material from its environment through membrane-bound vesicles. Endocytosis plays a crucial role in many cellular processes, including nutrient uptake, signal transduction, and the removal of pathogens and dying cells. Understanding the various synonyms for endocytosis helps in communicating scientific research and findings.