The abbreviation "ACTHR" is commonly used in the fields of biology and medicine, and stands for "adrenocorticotropic hormone receptor." This receptor is found on the surface of cells in the adrenal gland and is responsible for binding to the hormone ACTH, which regulates the production of cortisol. Synonyms for ACTHR include melanocortin receptor 2 (MC2R), Adrenocorticotropin receptor, and corticotropin receptor. These terms all refer to the same receptor and are used interchangeably in research and clinical settings. Understanding the functions and properties of ACTHR and its synonyms is essential for proper diagnosis and treatment of conditions related to cortisol regulation.