TMA may refer to:
Arts and entertainment Tejano Music Awards, Texas, US TMA Awards (now UK Theatre Awards) Total Media Agency, a Japanese pornography producer The Mod Archive, a web index of music module files The Magnus Archives, a fictional horror podcast "The Magician's Apprentice (Doctor Who)", a 2015 TV episode
Science Tense–Modality–Aspect or tense–aspect–mood, grammatical system Tetramethylammonium ion or its salts Thermomechanical analysis Third man argument, a philosophical criticism of Plato's theory of Forms Thrombotic microangiopathy Tissue microarray, device for analysing many histological tissue samples Transcription mediated amplification, in molecular biology Trimethylamine, (CH3)3N, a simple amine Trimethylaluminium, (CH3)3Al Trimesic acid Psychedelic or hallucinogenic drugs that are isomeric-substituted amphetamines: 3,4,5-Trimethoxyamphetamine (TMA or TMA-1) 2,4,5-Trimethoxyamphetamine (TMA-2) 2,3,4-Trimethoxyamphetamine (TMA-3) 2,3,5-Trimethoxyamphetamine (TMA-4) 2,3,6-Trimethoxyamphetamine (TMA-5) 2,4,6-Trimethoxyamphetamine (TMA-6) Tristeza y muerte de agave, a collective term for diseases of blue agave
Transportation Aviation Terminal Manoeuvring Area / Terminal Control Area - aviation term for a controlled high-volume airspace Trans Maldivian Airways TMA Cargo (Trans Mediterranean Airways SAL), a defunct Lebanese airline
Engineering TMA Engineering, UK Truck-mounted attenuator, crash attenuator
Space exploration Russian Soyuz spacecraft missions (, or ТМА) Soyuz TMA-1, launched 30 October 2002 Soyuz TMA-2, launched 26 April 2003 Soyuz TMA-3, launched 18 October 2003 Soyuz TMA-4, launched 19 April 2004 Soyuz TMA-5, launched 14 October 2004 Soyuz TMA-6, launch 15 April 2005 other Soyuz-TMA missions
Military Target Motion Analysis, by submarine sonar Tanzania Military Academy TMA (German mine) Yugoslavian landmines: TMA-1 mine TMA-2 mine TMA-3 mine TMA-4 mine
Communications Television Market Area, official designation of the U.S. Federal Communications Commission Tower Mounted Amplifier or masthead amplifier
Medicine Tissue microarray, a paraffin block in which tissue cores are assembled in array fashion to allow multiplex histological analysis
Other uses Tehsil Municipal Administration Texas A&M Maritime Academy, at Texas A&M University at Galveston TMA (The Marketing Arm), a marketing and creative agency owned by Omnicom Group