Crna or CRNA may refer to:Centre en route de la navigation aérienne, air traffic control centres across France Črna na Koroškem, a municipality in Slovenia Cost-related nonadherence to medications, see Medication costs for a related article Certified Registered Nurse Anesthetist, an advanced practice nurse with expertise in anesthesia in the United States cRNA, RNA derived from cDNA through standard RNA synthesis Center for Resilient Networks and Applications, a research institution in Oslo, Norway