RCT may refer to:

Science and technology Random conical tilt, a technique used in cryogenic electron microscopy Rational choice theory, a framework for understanding social and economic behavior Reverse conducting thyristor Ritchey–Chrétien telescope Rubber Chemistry and Technology, a scientific journal Reversible Color Transform, a technique in computer graphics

Medicine Randomized controlled trial, a research method used in medical and social sciences Radiochemotherapy, the combination of chemotherapy and radiotherapy to treat cancer Root canal treatment, dental treatment to treat nerve damage of the tooth Reverse cholesterol transport, pathway by which peripheral cell cholesterol can be returned to the liver for recycling to extrahepatic tissues, hepatic storage, or excretion into the intestine in bile

Organizations Ranipokhari Corner Team, a Nepalese football club RC Toulonnais, a rugby union club from Toulon, France Register of Clinical Technologists (UK) Rehabilitation and Research Centre for Torture Victims, Denmark Rose City Transit, a former mass transit company in Portland, Oregon Royal Corps of Transport, of the British Army Rural Community Transportation, a public bus system in Vermont, United States

Other uses Rameau Catalogue Thématique, a numbering system used to catalogue the works of Jean-Philippe Rameau Regents Competency Test, an alternative standardized test for special education high school students in New York State Regimental combat team, in the United States military Relational-cultural therapy, in psychology Relevant Contracts Tax, in Taxation in the Republic of Ireland Rhondda Cynon Taf, a county borough in Wales, UK RollerCoaster Tycoon, a video game series RollerCoaster Tycoon (video game), the first game in the series