GCR (or GCRS) may refer to:
Science
* Galactic
cosmic ray, a cosmic ray from outside the Solar System
*
Geocentric Celestial Reference System, a coordinate system for near-Earth objects like satellites
*
Geological Conservation Review, a procedure of the British Joint Nature Conservation Committee
*
Global catastrophic risk, a potential catastrophe that would affect the whole world
* ''
Global Competitiveness Report'', a yearly report published by the World Economic Forum
*
Glucocorticoid receptor, a cell protein which responds to glucocorticoid compounds
Technology
*
Gas-cooled reactor, a type of nuclear reactor
*
Ghost-canceling reference Ghost-canceling reference (GCR) is a special sub-signal on a television television channel, channel that receivers can use to compensate for the ghosting (television), ghosting effect of a television signal distorted by multipath propagation between ...
, a television subsignal
*
Grey component replacement
Within the CMY color space used in color printing, a range of colors can be achieved by combining the three primary colors. This combination can be thought of as a hue component (which will require a maximum of two primary colors) and a grey comp ...
, substitution of black ink for gray ink in color printing
*
Group coded recording, a technique for encoding digital data on magnetic tape or disk
Transportation
* GCR, ICAO code for
Tianjin Airlines, China
* GCR, stock symbol for
Gaylord Container Corporation, an American packing material manufacturer
*
Great Central Railway, a British railway company
**
Great Central Railway (heritage railway)
**
Great Central Railway (Nottingham)
Other uses
*
Glass City Rollers, an American roller derby league
* Graduate Common Room, a
Common Room (university)
A common room is a group into which students and the academic body are organised in some universities in the United Kingdom and Ireland—particularly collegiate universities such as Oxford and Cambridge, as well as the University of Bristol ...
for postgraduate students
*
Global Corruption Report by
Transparency International
*
Gray City Rebels, a Brazilian roller derby league
*
Green Corn Revival, an American band
* gcr, ISO 639-3 code for the
French Guianese Creole language
* ' (
Revolutionary Communist Group (Lebanon)
The Revolutionary Communist Group – RCG (Arabic: المجموعة الشيوعية الثورية , ''Tajammu' al-Shuyu'i al-Thawri''), or Groupe Communiste Révolutionnaire (GCR) in French, is a Trotskyist organisation in Lebanon, associated w ...
), a Lebanese Trotskyite group
{{disambiguation