TRA

Tra or TRA may refer to:

Biology

 * TRA (gene), in humans encodes the protein T-cell receptor alpha locus
 * Tra (gene), in Drosophila melanogaster encodes the protein female-specific protein transformer
 * Tra gene, a transfer gene
 * Triple releasing agent or serotonin-norepinephrine-dopamine releasing agent

Organizations

 * Taiwan Railways Administration, the main railway system in Taiwan
 * Tanzania Revenue Authority
 * Telecommunications Regulatory Authority of Lebanon
 * Telecommunications Regulatory Authority (UAE)
 * Tennessee Regulatory Authority, for public utilities
 * Theodore Roosevelt Association
 * TRA, Inc., US ad measurement company
 * Trinity River Authority, Texas, US
 * Tripoli Rocketry Association, US

People

 * Tra Hoa Bo Dê, King of Champa (in what is now southern Vietnam) 1342−1360
 * Phạm Văn Trà (born 1935), Vietnamese general
 * Trần Văn Trà (1918–1996), North Vietnamese general
 * William Tra Thomas (born 1974), former US footballer

Other

 * tRA (baseball statistic)
 * Taiwan Relations Act of the US, 1979
 * Tarama Airport, Okinawa Prefecture, Japan (IATA code: TRA)
 * Tax Receivable Agreements, a type of legal contract
 * Theory of reasoned action, a model of persuasion
 * Threat and risk assessment
 * Tirahi language of Afghanistan, ISO 639-3 code
 * Constellation Triangulum Australe
 * Transport Research Arena, European conference
 * Trans rights activist, in the transgender rights movement
 * "Tra", a song by Bad Gyal from her 2018 album Worldwide Angel
 * "Tra", a song by Soto Asa featuring Bad Gyal