Tocsin

A tocsin is an alarm signal,  given with a church bell. Usually this signal is given to tell people to assemble to face an imminent danger or threat. 

Tocsin can also be,

Cold War
TOCSIN, the codeword for any reading on the Bomb Power Indicator after a nuclear strike on the United Kingdom during the Cold War
Tocsin Bang, the codeword for any reading on the AWDREY instrument after a nuclear bomb strike on the United Kingdom during the Cold War
Exercise Tocsin, a name for the nuclear attack simulation performed by the Government of Canada
TOCSIN, a group of university students (at Harvard) against nuclear weapons, led by Todd Gitlin

Place
Tocsin, Indiana, a small town in Indiana in the United States

Music
the fourth and final movement of the Symphony No. 11 (1957) by Dmitri Shostakovich
Tocsin (album), a 1984 album by goth rock band Xmal Deutschland
Tocsin (Year of No Light album), a 2013 album by French shoegaze band Year of No Light

Newspapers
The Tocsin, an early Australian socialist newspaper
Tocsin (newspaper), a newspaper from Red Bluff, California; see California Digital Newspaper Collection
Marin County Tocsin, a newspaper from Marin County, California; see California Digital Newspaper Collection
Tehama Tocsin, an early name of the Chico Enterprise-Record newspaper in Tehama, California
Tocsin News , or The Enterprise-Tocsin, a newspaper in Mississippi
 The Tocsin of Liberty, an anti-slavery newspaper from the US Liberty Party

Other
"The Tocsin", a poem by John Pierpont

Category:Signalling