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, (CH<sub>3</sub>)<sub>3</sub>N, a simple amine
  • Trimethylaluminium, (CH<sub>3</sub>)<sub>3</sub>Al
  • 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
  • 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