Black triangle may refer to:
Places
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Black Triangle (region)
The Black Triangle (, , ) is the border region between Germany, Poland and the Czech Republic, long characterized by extremely high levels of pollution. The term was coined in the 1980s. For decades, industrially produced air pollutants (chiefly ...
, across Germany, Poland and the Czech Republic, long characterized by extremely high levels of pollution
* Black triangle, the nickname given to the area south of Montreal affected by a long term blackout during the
January 1998 North American ice storm
The North American Ice Storm of 1998 (also known as the Great Ice Storm of 1998 or the January Ice Storm) was a massive combination of five smaller successive ice storms in January 1998 that struck a relatively narrow swath of land from eastern ...
Other uses
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Black triangle (badge)
The inverted black triangle () was an Nazi concentration camp badge, identification badge used in Nazi concentration camps to mark prisoners designated ("Anti-social behaviour, a(nti-)social") (. . .) and ''arbeitsscheu'' ("work-shy"). The Rom ...
, a Nazi concentration camp badge worn by inmates deemed "asocial"
** Black triangle, an
LGBT symbol
Over the course of its history, the LGBTQ community has adopted certain symbols for self-identification to demonstrate unity, pride, shared values, and allegiance to one another. These symbols communicate ideas, concepts, and identity both wi ...
reclaimed from the Nazi use
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Angularis nigra
''Angularis nigra'', Latin for 'black angle', also known as open gingival embrasures, and colloquially known as "black triangle", is the space or gap seen at the cervical embrasure, below the contact point of some teeth. The interdental papilla d ...
'' (Latin for 'black angle'), triangular gap between teeth
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Black triangle (pharmacovigilance)
A black triangle appearing after the trade name of a British medicine (or vaccine) indicates that the medication is new to the market, or that an existing medicine (or vaccine) is being used for a new reason or by a new route of administration.
Ex ...
, suffixed to the trade name of British medicines when the drug is new on the market
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Black triangle (UFO)
Black triangles are unidentified flying object, UFOs reported as having a triangular shape and dark color, typically observed at night, described as large, silent, hovering, moving slowly, and displaying pulsating, colored lights which they ca ...
, a type of UFO
* Black triangle, several code points in
Unicode Geometric Shapes
{{disambiguation, geo