Black triangle may refer to one of the following:
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Black triangle (badge)
The inverted black triangle (german: schwarzes Dreieck) was an identification badge used in Nazi concentration camps to mark prisoners designated ''asozial'' (" asocial") (. . .) and ''arbeitsscheu'' ("work-shy"). The Roma and Sinti people wer ...
, a Nazi concentration camp badge worn by inmates deemed "asocial"
**
Lesbian or
feminist symbol reclaimed from the Nazi use
*
Angularis nigra, triangular gap between teeth
*
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
*
Black triangle (UFO)
Black triangles are 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 and can turn their lights off.
British s ...
, a type of UFO
* Black triangle, several code points in
Unicode Geometric Shapes
Geometric Shapes is a Unicode block of 96 symbols at code point range U+25A0–25FF.
U+25A0–U+25CF
The BLACK CIRCLE is displayed when typing in a password field, in order to hide characters from a screen recorder or shoulder surfing.
U+2 ...
Places
*
Black Triangle (region)
The Black Triangle (german: Schwarzes Dreieck) 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 ai ...
, the nickname for one of Europe's most polluted areas, where Germany, Poland and the Czech Republic meet
* The nickname given to the area south of Montreal worst affected by a long term blackout during the
North American ice storm of 1998
The North American Ice Storm of 1998 (also known as Great Ice Storm of 1998) was a massive combination of five smaller successive ice storms in January 1998 that struck a relatively narrow swath of land from eastern Ontario to southern Quebec, N ...
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