T4 or T-4 may refer to:

Airports and airlines

* Heathrow Terminal 4 * Tiyas Military Airbase, also known as the T-4 Airbase

Biology and medicine

T4 phage Escherichia virus T4 is a species of bacteriophages that infect ''Escherichia coli'' bacteria. It is a double-stranded DNA virus in the subfamily '' Tevenvirinae'' of the family '' Straboviridae''. T4 is capable of undergoing only a lytic li ...

, a bacteriophage *

Thyroxine Thyroxine, also known as T4, is a hormone produced by the thyroid gland. It is the primary form of thyroid hormone found in the blood and acts as a prohormone of the more active thyroid hormone, triiodothyronine (T3). Thyroxine and its acti ...

(T₄), a form of thyroid hormone * the T4

spinal nerve A spinal nerve is a mixed nerve, which carries Motor neuron, motor, Sensory neuron, sensory, and Autonomic nervous system, autonomic signals between the spinal cord and the body. In the human body there are 31 pairs of spinal nerves, one on each s ...

* the fourth thoracic vertebrae of the

vertebral column The spinal column, also known as the vertebral column, spine or backbone, is the core part of the axial skeleton in vertebrates. The vertebral column is the defining and eponymous characteristic of the vertebrate. The spinal column is a segmente ...

* A

non-small cell lung carcinoma staging Non-small-cell lung cancer (NSCLC), or non-small-cell lung carcinoma, is any type of epithelial lung cancer other than small-cell lung cancer (SCLC). NSCLC accounts for about 85% of all lung cancers. As a class, NSCLCs are relatively insensitive ...

for a type of tumour * A

CD4 In molecular biology, CD4 (cluster of differentiation 4) is a glycoprotein that serves as a co-receptor for the T-cell receptor (TCR). CD4 is found on the surface of immune cells such as helper T cells, monocytes, macrophages, and dendritic c ...

+ T lymphocyte * T4: an EEG electrode site according to the 10-20 system

Entertainment

* ''T4'' (Channel 4), the former daytime teen-aimed slot on Channel 4 in the UK * ''

Terminator Salvation ''Terminator Salvation'' is a 2009 American military science fiction action film that is the fourth installment of the ''Terminator'' franchise, serving as a sequel to '' Terminator 3: Rise of the Machines'' (2003). It is directed by McG an ...

'', sometimes referred to as ''Terminator 4'' * '' Transformers: Age of Extinction'', the fourth film in the live-action ''Transformers'' film series

Software and video games

Text Template Transformation Toolkit Text Template Transformation Toolkit (usually referred to as "T4") is a free and open-source template-based text generation framework. T4 source files are usually denoted by the file extension ".tt". Overview T4 is used by Developer (software), d ...

, a technology developed by Microsoft * ''

Tekken 4 is a 2001 fighting game developed and published by Namco for arcades. Initially released for Namco's System 246 hardware, it was then ported to the PlayStation 2 home console in 2002. As the fourth main installment in the '' Tekken'' series fol ...

'', a 2001 fighting game

Rail transport

Eastern Suburbs & Illawarra Line The Eastern Suburbs & Illawarra Line (numbered T4, coloured azure blue) is a commuter Rail transport in Australia, railway line on the Sydney Trains network in the Eastern Suburbs (Sydney), eastern and Southern Sydney, southern suburbs of Sydn ...

, a Sydney Trains railway service *

Île-de-France tramway Line 4 Île-de-France tramway Line 4, also called the T4, is an long tram-train line in the Seine-Saint-Denis department of Île-de-France. The line starts at Aulnay-sous-Bois Station, Aulnay-sous-Bois and features two branches, with the first running ...

* T4 (Istanbul Tram)

Vehicles

* Dayton-Wright T-4, a 1918 American light, single-seat reconnaissance aircraft *

Kawasaki T-4 The Kawasaki T-4 is a Japanese subsonic intermediate jet trainer aircraft developed and manufactured by the commercial conglomerate Kawasaki Heavy Industries. Its sole operator is the Japan Air Self-Defense Force (JASDF), in part due to historic ...

, a Japanese aircraft * Soyuz T-4, a space mission *

Sukhoi T-4 The Sukhoi T-4, or "Aircraft 100", or "Project 100", or "Sotka" is a Soviet high-speed reconnaissance, anti-ship and strategic bomber aircraft that did not proceed beyond the prototype stage. It is sometimes called the Su-100. Design and develo ...

, a Soviet aircraft * Tatra T4, a 1967 Czechoslovakian tram * Thaden T-4, a 1930s American four-seat all-metal cabin monoplane * Volkswagen Transporter series IV van * a model of the

OS T1000 T1000 and T1300 were two rapid transit train classes used on Oslo Metro in Oslo, Norway. The 197 cars were built by Strømmens Verksted, Norsk Elektrisk & Brown Boveri and AEG between 1960 and 1981. They were the first metro trains used in Oslo, ...

train of the Oslo Metro * Model T4 Cunningham experimental armored car, later the

M1 Armored car The M1 armored car was a four-wheel drive American armored car tested by the United States Army Ordnance Department in 1931 and briefly in 1932. It was built by James Cunningham, Son and Company of Rochester, New York, and during testing demar ...

Weapons and explosives

T-4 Atomic Demolition Munition The T4 Atomic Demolition Munition (ADM) was a nuclear weapon derived from the American W9 nuclear artillery shell. History The T4 was produced in 1957 from recycled W9 fissile components and was in service until 1963, when it was replaced with ...

, a small tactical nuclear bomb * G7e/T4, a Falke German torpedo * The Italian name for the high explosive

RDX RDX (Research Department Explosive or Royal Demolition Explosive) or hexogen, among other names, is an organic compound with the formula (CH2N2O2)3. It is white, odorless, and tasteless, widely used as an explosive. Chemically, it is classified ...

Other uses

Great East Road The Great East Road is a major road in Zambia and the main route linking its Eastern Province with the rest of the country. It is also the major link between Zambia and Malawi and between Zambia and northern Mozambique.Terracarta: ''Zambia, 2nd ...

, a road in Zambia * T4 road (Tanzania), a road in Tanzania * Lockheed Martin's High beta fusion reactor prototype, called T4 * A T4 slip, a tax return form used in

income taxes in Canada Income taxes in Canada constitute the majority of the annual revenues of the Government of Canada, and of the governments of the Provinces of Canada. In the fiscal year ending March 31, 2018, the federal government collected just over three times ...

* ''

Aktion T4 (German, ) was a campaign of Homicide#By state actors, mass murder by involuntary euthanasia which targeted Disability, people with disabilities and the mentally ill in Nazi Germany. The term was first used in post-WWII, war trials against d ...

'', Nazi Germany's mass-murder of the mentally and physically disabled *

Normal space Normal(s) or The Normal(s) may refer to: Film and television * Normal (2003 film), ''Normal'' (2003 film), starring Jessica Lange and Tom Wilkinson * Normal (2007 film), ''Normal'' (2007 film), starring Carrie-Anne Moss, Kevin Zegers, Callum Keit ...

in topology * Version 4 of ''Traveller'' role-playing game * T4, one of several

fluorescent-lamp formats Since their introduction as a commercial product in 1939, many different types of fluorescent lamp have been introduced. Systematic nomenclature identifies mass-market lamps as to overall shape, power rating, length, color, and other electrical ...

* A tornado intensity rating on the

TORRO scale The TORRO tornado intensity scale (or T-Scale) is a scale measuring tornado intensity between T0 and T11. It was proposed by Terence Meaden of the Tornado and Storm Research Organisation (TORRO), a meteorological organisation in the United Kingdo ...

* SPARC T4, a microprocessor introduced by Oracle Microelectronics in 2011