CTD

CTD may refer to:

Medicine

 * Carnitine transporter deficiency, an inborn error of fatty acid transport
 * Comparative Toxicogenomics Database, an online research tool describing chemical-gene-disease interactions
 * CTD (chemotherapy), a combination of the drugs cyclophosphamide, thalidomide, and dexamethasone
 * Common Technical Document, an internationally agreed format for drug approvals
 * Connective tissue disease
 * Circling the Drain, acronym relating to those on the way out

Music

 * Crash Test Dummies, a Canadian rock band from Winnipeg, Manitoba

Science

 * Comparative Toxicogenomics Database, an online research tool describing chemical-gene-disease interactions
 * CTD (instrument), in oceanography, used to determine conductivity, temperature, and depth
 * Carboxy-Terminal Domain, the end of an amino acid chain which has specialized functions in some proteins
 * Church–Turing–Deutsch principle, in computer science, relates to the universality of simulation

IT (Information Technology)

 * Crash to desktop
 * Continuous Threat Detection

Other

 * CBS Television Distribution
 * Central de Trabajadores Democráticos, a trade union centre in El Salvador
 * Continued, a word
 * Counter Terrorism Department, Pakistani agency for counter terrorism
 * FBI Counterterrorism Division, the United States Federal Bureau of Investigation's anti-terrorism division
 * Cummins Turbo Diesel, acronym for an engine genre