C14

C14, C.XIV or C-14 may refer to:

Time

 * The 14th century
 * Carbon-14, a radioactive isotope of carbon
 * C-14 dating, a method for dating events

Science

 * IEC 60320 C14, a polarised, three pole socket electrical connector
 * Malignant neoplasm of other and ill-defined sites in the lip, oral cavity and pharynx ICD-10 code
 * Caldwell 14, the Double Cluster in the constellation Perseus

Transportation

 * Autovía C-14, a highway in Catalonia in Spain
 * Fokker C.XIV, a 1937 Dutch reconnaissance seaplane
 * HMS C14, a 1908 British C-class submarine
 * LSWR C14 class, a London and South Western Railway locomotive class
 * LNER Class C14, a class of British steam locomotives
 * Ramal C-14, the Argentinian track of the Salta–Antofagasta railway
 * Sauber C14, a 1995 racing car
 * C 14-class missile boat, a light missile boat of catamaran design
 * Boeing YC-14, an American experimental transport aircraft of the 1970s
 * Concours 14 or Kawasaki 1400GTR, a 1,352cc motorcycle

Culture

 * C14 or S14 (Ukrainian group), a radical nationalist group in Ukraine
 * French Defence, an Encyclopedia of Chess Openings code
 * Bill C-14, a bill legalizing euthanasia in Canada

Other

 * C14 Timberwolf, a Canadian .338 Lapua sniper rifle