TMA

• 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
• 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

• Terminal Manoeuvring Area / Terminal Control Area - aviation term for a controlled high-volume airspace
• Trans Maldivian Airways
• TMA Cargo, Lebanese airline

• TMA Engineering, UK
• Truck-mounted attenuator, crash attenuator

• Russian Soyuz spacecraft missions; TMA are the Russian initials for Transport Modified Anthropometric
• 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

• Target Motion Analysis, by submarine SONAR
• Tanzania Military Academy
• Yugoslavian landmines:
• TMA-1 mine
• TMA-2 mine
• TMA-3 mine
• TMA-4 mine

• Television Market Area, official designation of the U.S. Federal Communications Commission
• Tower Mounted Amplifier or masthead amplifier

• Tissue microarray, a paraffin block in which tissue cores are assembled in array fashion to allow multiplex histological analysis

• Tehsil Municipal Administration
• Tejano Music Awards
• Texas A&M Maritime Academy, at Texas A&M University at Galveston
• Theatre Musicians Association, US
• TMA (The Marketing Arm), a marketing and creative agency owned by Omnicom Group
• TMA Awards of the UK Theatrical Management Association
• Total Media Agency, a Japanese pornographic video production company
• The Mod Archive, a web index and archive of playable music module files
• The Magnus Archives, a fictional horror podcast produced by Rusty Quill
• "The Magician's Apprentice", a 2015 episode of Doctor Who

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