1. (

• bromine ,
• Br ,
• atomic_number_ ,

) a nonmetallic heavy volatile corrosive dark brown liquid element belonging to the halogens; found in sea water ;

2. (

• Red_Brigades ,
• Brigate_Rosse ,
• BR

) a Marxist-Leninist terrorist organization that arose out of a student protest movement in the late 1960s; wants to separate Italy from NATO and advocates violence in the service of class warfare and revolution; mostly inactive since 1989 ;