Black triangle

Black triangle may refer to one of the following:

• Black triangle (badge), 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), suffixed to the trade name of British medicines when the drug is new on the market
• Black triangle (UFO), a type of UFO
• Black triangle, several code points in Unicode Geometric Shapes

Places

• Black Triangle (region), 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