C20

C20 or C-20 may refer to:

Science and technology Carbon-20 (C-20 or 20C), an isotope of carbon C20, 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 (ICD-10 code: C20) Caldwell 20 or North America Nebula, an emission nebula in the constellation Cygnus Eicosane (USA) or n-icosane (international), CH3-(CH2)18-CH3 or C20H42(s), a linear (straight-chain) alkane IEC 60320 C20, a polarised, three pole socket electrical connector C20 (Capacity, 20 hours), C100 (100 hours), battery capacity

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 C20 is a version of the Allison Model 250 aircraft engine

Other uses Bill C-20, the Canadian Clarity Act OMX Copenhagen 20, Denmark's primary stock market index King's Pawn Game, 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 Dr. Gero/C20, a character in Dragon Ball Z (1989)