C20 or C-20 may refer to:
Science and technology
*
Carbon-20 (C-20 or
20C), an isotope of carbon
* C
20, the smallest possible
fullerene (a carbon molecule)
*
C20 (engineering), a mix of concrete that has a compressive strength of 20 newtons per square millimeter
* Malignant neoplasm of rectum, a type of
colorectal cancer
Colorectal cancer (CRC), also known as bowel cancer, colon cancer, or rectal cancer, is the development of cancer from the colon or rectum (parts of the large intestine). Signs and symptoms may include blood in the stool, a change in bowel m ...
(ICD-10 code: C20)
*
Caldwell 20 or North America Nebula, an emission nebula in the constellation Cygnus
*
IEC 60320 C20
IEC 60320 Appliance couplers for household and similar general purposes is a set of standards from the International Electrotechnical Commission (IEC) specifying non-locking connectors for connecting power supply cords to electrical appliances o ...
, a polarised, three pole socket electrical connector
* C20 (Capacity, 20 hours), C100 (100 hours),
battery capacity
An electric battery is a source of electric power consisting of one or more electrochemical cells with external connections for powering electrical devices.
When a battery is supplying power, its positive terminal is the cathode and its neg ...
Transportation and military
*
Colt Canada C20 DMR, a Canadian designated marksman rifle
* , a 1910 British C-class submarine
*
Sauber C20, a 2001 racing car
*
SL C20, a type of rolling stock used in the Stockholm metro
* , a cruiser of the Royal Navy
* C-20, the proposed in-service designation of the
Fokker F-32
* C-20A/B/C/D/E, variants of the
Gulfstream III
* C-20F/G/H/J, variants of the
Gulfstream IV
Other uses
*
Bill C-20, the Canadian Clarity Act
*
OMX Copenhagen 20, Denmark's primary stock market index
*
King's Pawn Game
The King's Pawn Game is any chess opening starting with the move:
:1. e4
It is the most popular opening move in chess, followed by the Queen's Pawn Game.
Details about the move and the game plan
White opens with the most popular of the twen ...
, a chess opening (Encyclopaedia of Chess Openings code: C20)
*
The Twentieth Century Society, a British charity which campaigns for the preservation of architectural heritage from 1914 onwards
*
C20 Cities, now expanded to the C40 Cities Climate Leadership Group
See also
*
20th century
The 20th (twentieth) century began on
January 1, 1901 ( MCMI), and ended on December 31, 2000 ( MM). The 20th century was dominated by significant events that defined the modern era: Spanish flu pandemic, World War I and World War II, nuclear ...
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