V4 or V-4 may refer to:
Science and technology
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LNER Class V4
The London and North Eastern Railway Class V4 was a class of 2-6-2 steam locomotive designed by
Sir Nigel Gresley for mixed-traffic use. It was Gresley's last design for the LNER before he died in 1941. The V4s had similarities in their appeara ...
, a class of British steam locomotives
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V4 engine
A V4 engine is a four-cylinder piston engine where the cylinders share a common crankshaft and are arranged in a V engine, V configuration.
The V4 engine is less common compared to straight-four engines. However, V4 engines have been used in au ...
, a V engine with four cylinders in two banks of two cylinders
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Visual area V4
The visual cortex of the brain is the area of the cerebral cortex that processes visual perception, visual information. It is located in the occipital lobe. Sensory input originating from the eyes travels through the lateral geniculate nucleus ...
, in the visual cortex
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Klein four-group
In mathematics, the Klein four-group is an abelian group with four elements, in which each element is Involution (mathematics), self-inverse (composing it with itself produces the identity) and in which composing any two of the three non-identi ...
, in mathematics
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ITU-T V.4, a telecommunication recommendation
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ATC code V04
V04B Urine tests
:''Empty group''
V04C Other diagnostic agents
V04CA Tests for diabetes
:V04CA01 Tolbutamide
:V04CA02 Glucose
V04CB Tests for fat absorption
:V04CB01 Vitamin A concentrates
V04CC Tests for bile duct patency
:V04CC01 Sorbitol
: ...
''Diagnostic agents'', a subgroup of the Anatomical Therapeutic Chemical Classification System
* The V4
JavaScript
JavaScript (), often abbreviated as JS, is a programming language and core technology of the World Wide Web, alongside HTML and CSS. Ninety-nine percent of websites use JavaScript on the client side for webpage behavior.
Web browsers have ...
engine for
QML
QML (Qt Meta-object Language) is a user interface markup language. It is a declarative language (similar to CSS and JSON) for designing user interface–centric applications. Inline JavaScript code handles imperative aspects. It is associate ...
* V
4, one of six precordial leads in
electrocardiography
Electrocardiography is the process of producing an electrocardiogram (ECG or EKG), a recording of the heart's electrical activity through repeated cardiac cycles.
It is an electrogram of the heart which is a graph of voltage versus time of t ...
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V-4 (rocket launch)
V-4 was the first mostly-successful launch of the Aggregat 4 rocket, later known as (''V-2''). The launch occurred on the afternoon of 3 October 1942 and the rocket set a speed record of Mach 4, reached an apogee of , thereby becoming the fir ...
, first mostly-successful launch of the V-2 rocket
Other uses
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Visegrád Group
The Visegrád Group (also known as the Visegrád Four or the V4) is a cultural and political alliance of four Central European countries: the Czech Republic, Hungary, Poland, and Slovakia. The alliance aims to advance co-operation in military, e ...
, an alliance of four Central European states - Czech Republic, Hungary, Poland and Slovakia
* ''
Rheinbote
''Rheinbote'' (''Rhine Messenger'') was a German short range ballistic rocket developed by Rheinmetall-Borsig at Berlin- Marienfelde during World War II. It was intended to replace, or at least supplement, large-bore artillery by providing fire su ...
'' or V-4, a German World War II four-stage missile
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Saint Kitts & Nevis
Saint Kitts and Nevis, officially the Federation of Saint Christopher (St Kitts) and Nevis, is an island country consisting of the two islands of Saint Kitts and Nevis, both located in the West Indies, in the Leeward Islands chain of the Less ...
(ITU prefix)
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Vieques Air Link
Vieques Air Link (VAL, IATA code: V4) is a small VFR (Visual Flight Rules) Puerto Rico-based airline that operates under FAR Part 135, that links Vieques, Puerto Rico, Vieques and Culebra, Puerto Rico, Culebra with mainland Puerto Rico.
Hist ...
(IATA airline code)
* V4, a
grade (climbing)
Many climbing routes have grades for the technical difficulty, and in some cases for the risks, of the route. The first ascent, first ascensionist can suggest a grade but it will be amended for the ''consensus view'' of subsequent ascents. W ...
for difficulty of a boulder climbing route
See also
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4V (disambiguation)
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